./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.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_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/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_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/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_a95a0386-ce50-4550-89b4-a9f4681aebff/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 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:32:06,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:32:06,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:32:06,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:32:06,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:32:06,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:32:06,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:32:06,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:32:06,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:32:06,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:32:06,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:32:06,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:32:06,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:32:06,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:32:06,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:32:06,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:32:06,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:32:06,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:32:06,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:32:06,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:32:06,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:32:06,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:32:06,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:32:06,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:32:06,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:32:06,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:32:06,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:32:06,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:32:06,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:32:06,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:32:06,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:32:06,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:32:06,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:32:06,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:32:06,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:32:06,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:32:06,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:32:06,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:32:06,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:32:06,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:32:06,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:32:06,397 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:32:06,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:32:06,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:32:06,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:32:06,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:32:06,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:32:06,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:32:06,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:32:06,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:32:06,440 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:32:06,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:32:06,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:32:06,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:32:06,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:32:06,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:32:06,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:32:06,443 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:32:06,443 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:32:06,443 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:32:06,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:32:06,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:32:06,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:32:06,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:32:06,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:32:06,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:32:06,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:32:06,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:06,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:32:06,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:32:06,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:32:06,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:32:06,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:32:06,448 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_a95a0386-ce50-4550-89b4-a9f4681aebff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2021-11-20 05:32:06,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:32:06,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:32:06,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:32:06,750 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:32:06,750 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:32:06,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2021-11-20 05:32:06,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/data/db49d007f/a4fc8001ddc74dca9223fa6ad3c52b24/FLAG48846f2c6 [2021-11-20 05:32:07,344 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:32:07,345 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2021-11-20 05:32:07,372 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/data/db49d007f/a4fc8001ddc74dca9223fa6ad3c52b24/FLAG48846f2c6 [2021-11-20 05:32:07,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/data/db49d007f/a4fc8001ddc74dca9223fa6ad3c52b24 [2021-11-20 05:32:07,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:32:07,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:32:07,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:07,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:32:07,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:32:07,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2363f0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:07, skipping insertion in model container [2021-11-20 05:32:07,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:07" (1/1) ... [2021-11-20 05:32:07,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:32:07,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:32:08,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:08,161 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:32:08,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:32:08,266 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:32:08,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08 WrapperNode [2021-11-20 05:32:08,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:32:08,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:08,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:32:08,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:32:08,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,327 INFO L137 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2021-11-20 05:32:08,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:32:08,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:32:08,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:32:08,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:32:08,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:32:08,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:32:08,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:32:08,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:32:08,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (1/1) ... [2021-11-20 05:32:08,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:32:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:08,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:32:08,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:32:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:32:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:32:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:32:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:32:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:32:08,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:32:08,629 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:32:08,630 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:32:08,899 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:32:08,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:32:08,910 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-20 05:32:08,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:08 BoogieIcfgContainer [2021-11-20 05:32:08,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:32:08,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:32:08,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:32:08,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:32:08,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:07" (1/3) ... [2021-11-20 05:32:08,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e984e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:08, skipping insertion in model container [2021-11-20 05:32:08,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:08" (2/3) ... [2021-11-20 05:32:08,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e984e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:08, skipping insertion in model container [2021-11-20 05:32:08,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:08" (3/3) ... [2021-11-20 05:32:08,924 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2021-11-20 05:32:08,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:32:08,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-20 05:32:08,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:32:08,982 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 05:32:08,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-20 05:32:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 05:32:09,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:09,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:09,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-20 05:32:09,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14424126] [2021-11-20 05:32:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,241 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 05:32:09,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14424126] [2021-11-20 05:32:09,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14424126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:09,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:09,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:32:09,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130413071] [2021-11-20 05:32:09,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:09,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:09,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:09,280 INFO L87 Difference]: Start difference. First operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 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 05:32:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:09,346 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-11-20 05:32:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:09,349 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 05:32:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:09,357 INFO L225 Difference]: With dead ends: 77 [2021-11-20 05:32:09,357 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 05:32:09,359 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 05:32:09,363 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:09,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 68 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 05:32:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-20 05:32:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 74 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 05:32:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-11-20 05:32:09,403 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 7 [2021-11-20 05:32:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:09,403 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-11-20 05:32:09,403 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 05:32:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-11-20 05:32:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 05:32:09,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:09,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:09,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:32:09,405 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-11-20 05:32:09,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:09,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205754199] [2021-11-20 05:32:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,507 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 05:32:09,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205754199] [2021-11-20 05:32:09,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205754199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:09,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:09,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:09,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926153985] [2021-11-20 05:32:09,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:09,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:09,511 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:32:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:09,610 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-11-20 05:32:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:32:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:09,613 INFO L225 Difference]: With dead ends: 79 [2021-11-20 05:32:09,613 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 05:32:09,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:09,615 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 193 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 05:32:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-20 05:32:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:09,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-11-20 05:32:09,630 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 7 [2021-11-20 05:32:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:09,631 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-11-20 05:32:09,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:32:09,631 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-11-20 05:32:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:32:09,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:09,632 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:09,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:32:09,633 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-11-20 05:32:09,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:09,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456833948] [2021-11-20 05:32:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,782 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 05:32:09,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456833948] [2021-11-20 05:32:09,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456833948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686590471] [2021-11-20 05:32:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:09,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:09,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:09,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:32:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:32:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:10,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:10,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686590471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:10,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:10,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-20 05:32:10,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318574556] [2021-11-20 05:32:10,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:10,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:10,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:10,007 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:10,067 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2021-11-20 05:32:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 05:32:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:10,071 INFO L225 Difference]: With dead ends: 149 [2021-11-20 05:32:10,071 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 05:32:10,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:10,073 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 230 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:10,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 162 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 05:32:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 84. [2021-11-20 05:32:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-11-20 05:32:10,088 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 11 [2021-11-20 05:32:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:10,089 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-11-20 05:32:10,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-11-20 05:32:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:32:10,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:10,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:10,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:10,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:10,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-20 05:32:10,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557373339] [2021-11-20 05:32:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:10,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:10,468 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 05:32:10,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557373339] [2021-11-20 05:32:10,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557373339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160319548] [2021-11-20 05:32:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:10,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:10,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:10,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:32:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:32:10,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:10,654 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:32:10,655 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 05:32:10,671 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 05:32:10,796 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 05:32:10,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:11,103 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 05:32:11,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160319548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:11,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:11,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 05:32:11,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327397389] [2021-11-20 05:32:11,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:32:11,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:32:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:11,109 INFO L87 Difference]: Start difference. First operand 84 states and 97 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 05:32:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:11,293 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2021-11-20 05:32:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:11,294 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 05:32:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:11,295 INFO L225 Difference]: With dead ends: 85 [2021-11-20 05:32:11,296 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 05:32:11,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:32:11,297 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 233 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:11,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 232 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 05:32:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-11-20 05:32:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 81 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 05:32:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-11-20 05:32:11,309 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 11 [2021-11-20 05:32:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-11-20 05:32:11,310 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 05:32:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-11-20 05:32:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:32:11,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:11,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:11,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:11,525 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2021-11-20 05:32:11,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414826557] [2021-11-20 05:32:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:11,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414826557] [2021-11-20 05:32:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414826557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:11,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798533762] [2021-11-20 05:32:11,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:11,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:11,583 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:11,624 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-11-20 05:32:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:32:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:11,626 INFO L225 Difference]: With dead ends: 88 [2021-11-20 05:32:11,626 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 05:32:11,627 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 05:32:11,628 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 84 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 152 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 05:32:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-11-20 05:32:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-11-20 05:32:11,643 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 13 [2021-11-20 05:32:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:11,644 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-11-20 05:32:11,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-11-20 05:32:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:32:11,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:11,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 05:32:11,645 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-11-20 05:32:11,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112986691] [2021-11-20 05:32:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:11,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112986691] [2021-11-20 05:32:11,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112986691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:32:11,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474779470] [2021-11-20 05:32:11,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:32:11,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:32:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:32:11,719 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:11,760 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-20 05:32:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:32:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:32:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:11,762 INFO L225 Difference]: With dead ends: 81 [2021-11-20 05:32:11,762 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 05:32:11,762 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 05:32:11,763 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:11,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 05:32:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-20 05:32:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.540983606557377) internal successors, (94), 80 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 05:32:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-20 05:32:11,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2021-11-20 05:32:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:11,779 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-20 05:32:11,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-20 05:32:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:32:11,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:11,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:11,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 05:32:11,782 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-11-20 05:32:11,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:11,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133296485] [2021-11-20 05:32:11,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:11,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:11,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133296485] [2021-11-20 05:32:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133296485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:11,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:11,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:32:11,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719530939] [2021-11-20 05:32:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:11,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:11,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:11,925 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:11,987 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-11-20 05:32:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:32:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:11,990 INFO L225 Difference]: With dead ends: 83 [2021-11-20 05:32:11,990 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 05:32:11,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:11,991 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 159 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:11,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 113 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 05:32:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-11-20 05:32:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 80 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 05:32:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-11-20 05:32:12,010 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2021-11-20 05:32:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:12,010 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-11-20 05:32:12,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-11-20 05:32:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:32:12,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:12,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:12,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 05:32:12,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2021-11-20 05:32:12,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389786442] [2021-11-20 05:32:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:12,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:12,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389786442] [2021-11-20 05:32:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389786442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14113745] [2021-11-20 05:32:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:12,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:12,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:12,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:12,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:32:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:32:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:12,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:12,548 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 22 treesize of output 18 [2021-11-20 05:32:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:12,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14113745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:12,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:12,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-20 05:32:12,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651873632] [2021-11-20 05:32:12,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:12,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:32:12,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:32:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:32:12,634 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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 05:32:12,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:12,864 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-11-20 05:32:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:12,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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) Word has length 17 [2021-11-20 05:32:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:12,866 INFO L225 Difference]: With dead ends: 144 [2021-11-20 05:32:12,866 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 05:32:12,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:32:12,867 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 268 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:12,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 448 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 05:32:12,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2021-11-20 05:32:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 88 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2021-11-20 05:32:12,873 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 17 [2021-11-20 05:32:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:12,874 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2021-11-20 05:32:12,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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 05:32:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2021-11-20 05:32:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:32:12,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:12,875 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:12,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:13,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:13,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-11-20 05:32:13,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:13,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093805879] [2021-11-20 05:32:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:13,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:13,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093805879] [2021-11-20 05:32:13,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093805879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298248073] [2021-11-20 05:32:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:13,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:13,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:13,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:32:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:32:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:13,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:13,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298248073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:13,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:13,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-20 05:32:13,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329022443] [2021-11-20 05:32:13,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:13,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:13,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:13,296 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:13,316 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2021-11-20 05:32:13,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-20 05:32:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:13,318 INFO L225 Difference]: With dead ends: 170 [2021-11-20 05:32:13,318 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 05:32:13,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:13,321 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 199 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:13,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 159 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 05:32:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-11-20 05:32:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.372340425531915) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-11-20 05:32:13,331 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 17 [2021-11-20 05:32:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:13,332 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-11-20 05:32:13,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-11-20 05:32:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:32:13,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:13,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:13,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 05:32:13,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:13,545 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-11-20 05:32:13,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986914902] [2021-11-20 05:32:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:13,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:13,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:13,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986914902] [2021-11-20 05:32:13,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986914902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720730344] [2021-11-20 05:32:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:13,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:13,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:13,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:13,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:32:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:13,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:32:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:13,726 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:13,726 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 05:32:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:13,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720730344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:14,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:14,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 05:32:14,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718031504] [2021-11-20 05:32:14,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:32:14,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:32:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:32:14,096 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,196 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-11-20 05:32:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:32:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 17 [2021-11-20 05:32:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,198 INFO L225 Difference]: With dead ends: 116 [2021-11-20 05:32:14,198 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 05:32:14,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:32:14,199 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 277 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 177 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 05:32:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-11-20 05:32:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 92 states have (on average 1.358695652173913) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-11-20 05:32:14,208 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 17 [2021-11-20 05:32:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,209 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-11-20 05:32:14,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-11-20 05:32:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:32:14,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:32:14,428 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2021-11-20 05:32:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527958255] [2021-11-20 05:32:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:14,521 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 05:32:14,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:14,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527958255] [2021-11-20 05:32:14,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527958255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:14,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:14,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:14,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448460301] [2021-11-20 05:32:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:32:14,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:32:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:14,526 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,612 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-11-20 05:32:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:14,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-20 05:32:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,615 INFO L225 Difference]: With dead ends: 109 [2021-11-20 05:32:14,616 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 05:32:14,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:14,617 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 155 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 114 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 05:32:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2021-11-20 05:32:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-11-20 05:32:14,621 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 17 [2021-11-20 05:32:14,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,622 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-11-20 05:32:14,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-11-20 05:32:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:32:14,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 05:32:14,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1860324492, now seen corresponding path program 1 times [2021-11-20 05:32:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49326791] [2021-11-20 05:32:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:14,668 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 05:32:14,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49326791] [2021-11-20 05:32:14,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49326791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:14,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:14,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:14,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358886133] [2021-11-20 05:32:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:14,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:14,671 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,727 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-11-20 05:32:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:14,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 05:32:14,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,729 INFO L225 Difference]: With dead ends: 95 [2021-11-20 05:32:14,729 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 05:32:14,729 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 05:32:14,730 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 113 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 05:32:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-20 05:32:14,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-11-20 05:32:14,735 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 20 [2021-11-20 05:32:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,735 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-11-20 05:32:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-11-20 05:32:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:32:14,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 05:32:14,737 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1860324491, now seen corresponding path program 1 times [2021-11-20 05:32:14,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386276437] [2021-11-20 05:32:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:32:14,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386276437] [2021-11-20 05:32:14,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386276437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:14,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:14,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:32:14,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246620734] [2021-11-20 05:32:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:14,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:14,809 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,860 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-20 05:32:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:14,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 05:32:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,861 INFO L225 Difference]: With dead ends: 94 [2021-11-20 05:32:14,861 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:32:14,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:32:14,863 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 120 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:32:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-20 05:32:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 93 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 05:32:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-11-20 05:32:14,868 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 20 [2021-11-20 05:32:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,869 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-11-20 05:32:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-11-20 05:32:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:32:14,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 05:32:14,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1331077295, now seen corresponding path program 1 times [2021-11-20 05:32:14,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442335453] [2021-11-20 05:32:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:14,925 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 05:32:14,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:14,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442335453] [2021-11-20 05:32:14,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442335453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:14,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:14,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:14,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325967798] [2021-11-20 05:32:14,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:14,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:14,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:14,928 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 05:32:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,980 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-11-20 05:32:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 23 [2021-11-20 05:32:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,984 INFO L225 Difference]: With dead ends: 95 [2021-11-20 05:32:14,984 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 05:32:14,984 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 05:32:14,985 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 164 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 88 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 05:32:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-20 05:32:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 92 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-11-20 05:32:14,989 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 23 [2021-11-20 05:32:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,989 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-11-20 05:32:14,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 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 05:32:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-11-20 05:32:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:32:14,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:32:14,991 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1331077296, now seen corresponding path program 1 times [2021-11-20 05:32:14,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298358176] [2021-11-20 05:32:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:32:15,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298358176] [2021-11-20 05:32:15,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298358176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:15,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:15,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:32:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57923190] [2021-11-20 05:32:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:32:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:32:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:32:15,122 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 05:32:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:15,240 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-11-20 05:32:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:32:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 23 [2021-11-20 05:32:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:15,241 INFO L225 Difference]: With dead ends: 107 [2021-11-20 05:32:15,241 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 05:32:15,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:32:15,242 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 35 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:15,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 464 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 05:32:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-11-20 05:32:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 98 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 05:32:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2021-11-20 05:32:15,245 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 23 [2021-11-20 05:32:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:15,246 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2021-11-20 05:32:15,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 05:32:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2021-11-20 05:32:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:32:15,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:15,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:15,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:32:15,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 513428846, now seen corresponding path program 1 times [2021-11-20 05:32:15,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688537757] [2021-11-20 05:32:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:15,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:15,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688537757] [2021-11-20 05:32:15,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688537757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662938380] [2021-11-20 05:32:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:15,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:15,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:15,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:32:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 05:32:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:15,644 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 05:32:15,774 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-20 05:32:15,774 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 33 treesize of output 25 [2021-11-20 05:32:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:15,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:15,867 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 20 treesize of output 18 [2021-11-20 05:32:15,869 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 24 [2021-11-20 05:32:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662938380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:16,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-20 05:32:16,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237057051] [2021-11-20 05:32:16,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:32:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:32:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:32:16,232 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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 05:32:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:16,508 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-11-20 05:32:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:32:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) Word has length 23 [2021-11-20 05:32:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:16,510 INFO L225 Difference]: With dead ends: 116 [2021-11-20 05:32:16,510 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 05:32:16,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:32:16,511 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:16,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 859 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-11-20 05:32:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 05:32:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2021-11-20 05:32:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 102 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 05:32:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-11-20 05:32:16,516 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 23 [2021-11-20 05:32:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:16,516 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-11-20 05:32:16,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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 05:32:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-11-20 05:32:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:32:16,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:16,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:16,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:16,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 05:32:16,743 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -731742098, now seen corresponding path program 1 times [2021-11-20 05:32:16,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:16,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862276404] [2021-11-20 05:32:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:16,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:32:16,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:16,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862276404] [2021-11-20 05:32:16,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862276404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:16,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:16,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:32:16,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205938921] [2021-11-20 05:32:16,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:16,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:16,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:16,818 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:16,863 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-11-20 05:32:16,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:16,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-20 05:32:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:16,865 INFO L225 Difference]: With dead ends: 102 [2021-11-20 05:32:16,865 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 05:32:16,865 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 05:32:16,866 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:16,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:16,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 05:32:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-20 05:32:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.360655737704918) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-20 05:32:16,869 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2021-11-20 05:32:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:16,869 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-20 05:32:16,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-20 05:32:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:32:16,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:16,870 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] [2021-11-20 05:32:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 05:32:16,871 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash 510694897, now seen corresponding path program 2 times [2021-11-20 05:32:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:16,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726022722] [2021-11-20 05:32:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:17,007 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 05:32:17,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726022722] [2021-11-20 05:32:17,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726022722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812553436] [2021-11-20 05:32:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:17,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:17,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:17,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:32:17,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:32:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 05:32:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:17,102 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:17,102 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 05:32:17,292 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 05:32:17,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:17,389 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 30 treesize of output 30 [2021-11-20 05:32:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:17,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:32:17,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812553436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:17,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:32:17,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2021-11-20 05:32:17,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192574271] [2021-11-20 05:32:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:17,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:32:17,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:32:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:32:17,543 INFO L87 Difference]: Start difference. First operand 74 states and 83 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 05:32:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:17,854 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-11-20 05:32:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:32:17,855 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 27 [2021-11-20 05:32:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:17,856 INFO L225 Difference]: With dead ends: 114 [2021-11-20 05:32:17,856 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 05:32:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-20 05:32:17,857 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 246 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:17,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 245 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-11-20 05:32:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 05:32:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-11-20 05:32:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-20 05:32:17,861 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2021-11-20 05:32:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:17,862 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-20 05:32:17,863 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 05:32:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-20 05:32:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:32:17,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:17,864 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 05:32:17,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:18,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 05:32:18,064 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1337529045, now seen corresponding path program 1 times [2021-11-20 05:32:18,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:18,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090999383] [2021-11-20 05:32:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:18,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:18,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090999383] [2021-11-20 05:32:18,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090999383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771316772] [2021-11-20 05:32:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:18,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:18,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:18,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:32:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 05:32:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:18,787 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 05:32:19,131 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-20 05:32:19,131 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 35 treesize of output 27 [2021-11-20 05:32:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:19,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:19,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-20 05:32:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 05:32:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:19,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771316772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:19,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:19,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2021-11-20 05:32:19,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774723295] [2021-11-20 05:32:19,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:19,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:32:19,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:32:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:32:19,647 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 05:32:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:20,582 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2021-11-20 05:32:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:32:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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) Word has length 30 [2021-11-20 05:32:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:20,584 INFO L225 Difference]: With dead ends: 115 [2021-11-20 05:32:20,584 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 05:32:20,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:32:20,587 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 129 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:20,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 854 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 273 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2021-11-20 05:32:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 05:32:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2021-11-20 05:32:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-11-20 05:32:20,591 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 30 [2021-11-20 05:32:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:20,591 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-11-20 05:32:20,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 05:32:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-11-20 05:32:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:32:20,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:20,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:20,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 05:32:20,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:20,807 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1863084157, now seen corresponding path program 1 times [2021-11-20 05:32:20,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:20,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905347292] [2021-11-20 05:32:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:20,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:20,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905347292] [2021-11-20 05:32:20,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905347292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:20,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237854232] [2021-11-20 05:32:20,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:20,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:20,872 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:20,919 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-11-20 05:32:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 05:32:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:20,921 INFO L225 Difference]: With dead ends: 86 [2021-11-20 05:32:20,921 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 05:32:20,921 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 05:32:20,922 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:20,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 106 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 05:32:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-20 05:32:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 85 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-11-20 05:32:20,926 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 33 [2021-11-20 05:32:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:20,927 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-11-20 05:32:20,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-11-20 05:32:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:32:20,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:20,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:20,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 05:32:20,928 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1863084158, now seen corresponding path program 1 times [2021-11-20 05:32:20,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986530555] [2021-11-20 05:32:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:20,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:21,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986530555] [2021-11-20 05:32:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986530555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581226807] [2021-11-20 05:32:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:21,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:21,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:21,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:32:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:32:21,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:21,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:21,416 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 20 treesize of output 16 [2021-11-20 05:32:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:21,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581226807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:21,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:21,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-11-20 05:32:21,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597165042] [2021-11-20 05:32:21,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:21,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:32:21,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:32:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:32:21,439 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:21,602 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-11-20 05:32:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:32:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 05:32:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:21,603 INFO L225 Difference]: With dead ends: 94 [2021-11-20 05:32:21,603 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 05:32:21,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:32:21,604 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 188 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:21,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 211 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 05:32:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-11-20 05:32:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-20 05:32:21,608 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 33 [2021-11-20 05:32:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:21,608 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-20 05:32:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-20 05:32:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:32:21,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:21,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 05:32:21,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 05:32:21,819 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1878769906, now seen corresponding path program 2 times [2021-11-20 05:32:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:21,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107806352] [2021-11-20 05:32:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:21,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:21,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107806352] [2021-11-20 05:32:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107806352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157253223] [2021-11-20 05:32:21,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:21,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:21,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:21,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:21,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:32:22,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 05:32:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:22,420 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 05:32:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157253223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:22,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:22,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2021-11-20 05:32:22,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40336543] [2021-11-20 05:32:22,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:22,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:32:22,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:32:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:32:22,488 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:23,028 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-11-20 05:32:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:32:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 05:32:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:23,032 INFO L225 Difference]: With dead ends: 211 [2021-11-20 05:32:23,033 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 05:32:23,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:32:23,034 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 787 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:23,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 747 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:32:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 05:32:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 92. [2021-11-20 05:32:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.2875) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-11-20 05:32:23,040 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 34 [2021-11-20 05:32:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:23,041 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-11-20 05:32:23,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-11-20 05:32:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:32:23,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:23,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:23,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:23,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:23,263 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1579516876, now seen corresponding path program 3 times [2021-11-20 05:32:23,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676336755] [2021-11-20 05:32:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:23,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:32:23,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:23,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676336755] [2021-11-20 05:32:23,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676336755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:23,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165969703] [2021-11-20 05:32:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:32:23,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:23,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:23,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 05:32:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:32:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 05:32:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:23,618 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:23,619 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 05:32:23,772 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 05:32:24,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:24,043 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 31 treesize of output 31 [2021-11-20 05:32:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:32:24,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:24,724 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 39 treesize of output 37 [2021-11-20 05:32:24,727 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 45 treesize of output 43 [2021-11-20 05:32:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 05:32:25,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165969703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:25,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:25,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 31 [2021-11-20 05:32:25,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879842535] [2021-11-20 05:32:25,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:25,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:32:25,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:32:25,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:32:25,188 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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 05:32:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:26,256 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2021-11-20 05:32:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:32:26,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) Word has length 37 [2021-11-20 05:32:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:26,259 INFO L225 Difference]: With dead ends: 106 [2021-11-20 05:32:26,259 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 05:32:26,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=341, Invalid=2739, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 05:32:26,262 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:26,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 761 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 379 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2021-11-20 05:32:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 05:32:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-20 05:32:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 99 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 05:32:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-11-20 05:32:26,275 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2021-11-20 05:32:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:26,275 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-11-20 05:32:26,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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 05:32:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-11-20 05:32:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:32:26,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:26,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:26,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:26,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:26,491 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1768471691, now seen corresponding path program 1 times [2021-11-20 05:32:26,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586556263] [2021-11-20 05:32:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:26,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:32:26,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:26,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586556263] [2021-11-20 05:32:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586556263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:26,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:26,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 05:32:26,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289439968] [2021-11-20 05:32:26,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:32:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:32:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:26,669 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:26,834 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-20 05:32:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:32:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 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 05:32:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:26,836 INFO L225 Difference]: With dead ends: 151 [2021-11-20 05:32:26,836 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 05:32:26,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:32:26,837 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 58 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:26,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 369 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 05:32:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-20 05:32:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-20 05:32:26,841 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 38 [2021-11-20 05:32:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-20 05:32:26,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-20 05:32:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:32:26,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:26,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:26,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 05:32:26,848 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1374104905, now seen corresponding path program 1 times [2021-11-20 05:32:26,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633077815] [2021-11-20 05:32:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:26,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:27,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633077815] [2021-11-20 05:32:27,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633077815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833729272] [2021-11-20 05:32:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:27,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:27,055 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:27,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 05:32:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 05:32:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:27,136 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 05:32:27,344 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 05:32:27,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 05:32:27,772 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:32:27,773 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 05:32:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:27,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:28,440 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|) 0)) is different from false [2021-11-20 05:32:28,462 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 46 treesize of output 42 [2021-11-20 05:32:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833729272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:28,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:28,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2021-11-20 05:32:28,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778789538] [2021-11-20 05:32:28,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:28,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:32:28,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:32:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=388, Unknown=1, NotChecked=40, Total=506 [2021-11-20 05:32:28,642 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 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 05:32:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:30,323 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-20 05:32:30,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:32:30,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 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) Word has length 38 [2021-11-20 05:32:30,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:30,325 INFO L225 Difference]: With dead ends: 151 [2021-11-20 05:32:30,325 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 05:32:30,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=146, Invalid=669, Unknown=1, NotChecked=54, Total=870 [2021-11-20 05:32:30,326 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 51 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:30,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 714 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2021-11-20 05:32:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 05:32:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2021-11-20 05:32:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.255813953488372) internal successors, (108), 96 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 05:32:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-11-20 05:32:30,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 38 [2021-11-20 05:32:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-11-20 05:32:30,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 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 05:32:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-11-20 05:32:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:32:30,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:30,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:30,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 05:32:30,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 05:32:30,559 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash 514562726, now seen corresponding path program 2 times [2021-11-20 05:32:30,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:30,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736928696] [2021-11-20 05:32:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:30,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:30,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736928696] [2021-11-20 05:32:30,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736928696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082445355] [2021-11-20 05:32:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:32:30,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:30,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:30,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 05:32:30,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:32:30,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 05:32:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:30,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:31,177 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 05:32:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:31,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082445355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:31,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:31,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-20 05:32:31,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256895832] [2021-11-20 05:32:31,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:32:31,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:32:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:32:31,255 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 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 05:32:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:31,618 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2021-11-20 05:32:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:32:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 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) Word has length 42 [2021-11-20 05:32:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:31,620 INFO L225 Difference]: With dead ends: 133 [2021-11-20 05:32:31,620 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 05:32:31,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:32:31,621 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 451 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:31,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 431 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 05:32:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2021-11-20 05:32:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 119 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 05:32:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2021-11-20 05:32:31,625 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 42 [2021-11-20 05:32:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:31,625 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2021-11-20 05:32:31,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 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 05:32:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2021-11-20 05:32:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:32:31,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:31,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:31,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:31,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 05:32:31,827 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1228465231, now seen corresponding path program 1 times [2021-11-20 05:32:31,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386898149] [2021-11-20 05:32:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:31,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:31,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:31,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386898149] [2021-11-20 05:32:31,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386898149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:31,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:31,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:31,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589153620] [2021-11-20 05:32:31,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:31,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:32:31,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:32:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:31,889 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:31,937 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2021-11-20 05:32:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:32:31,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 43 [2021-11-20 05:32:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:31,939 INFO L225 Difference]: With dead ends: 127 [2021-11-20 05:32:31,939 INFO L226 Difference]: Without dead ends: 127 [2021-11-20 05:32:31,939 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 05:32:31,940 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:31,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-20 05:32:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2021-11-20 05:32:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 117 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2021-11-20 05:32:31,946 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 43 [2021-11-20 05:32:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2021-11-20 05:32:31,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2021-11-20 05:32:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:32:31,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:31,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 05:32:31,948 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1228465230, now seen corresponding path program 1 times [2021-11-20 05:32:31,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635869750] [2021-11-20 05:32:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:31,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:32,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635869750] [2021-11-20 05:32:32,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635869750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916114460] [2021-11-20 05:32:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:32,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:32,087 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 05:32:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 05:32:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:32,620 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 5 [2021-11-20 05:32:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:32,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916114460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:32,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:32,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-11-20 05:32:32,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422285251] [2021-11-20 05:32:32,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:32,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 05:32:32,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 05:32:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:32:32,647 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:32,996 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2021-11-20 05:32:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:32:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 43 [2021-11-20 05:32:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:32,999 INFO L225 Difference]: With dead ends: 164 [2021-11-20 05:32:33,000 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 05:32:33,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:32:33,001 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 574 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:33,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 367 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 05:32:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2021-11-20 05:32:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 117 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-11-20 05:32:33,016 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 43 [2021-11-20 05:32:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:33,016 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-11-20 05:32:33,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-11-20 05:32:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:32:33,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:33,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:33,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:33,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 05:32:33,231 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash 560922322, now seen corresponding path program 1 times [2021-11-20 05:32:33,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923744620] [2021-11-20 05:32:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:33,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:32:33,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923744620] [2021-11-20 05:32:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923744620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:33,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:33,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:32:33,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187740738] [2021-11-20 05:32:33,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:33,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:33,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:33,275 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:33,340 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2021-11-20 05:32:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:33,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 45 [2021-11-20 05:32:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:33,341 INFO L225 Difference]: With dead ends: 128 [2021-11-20 05:32:33,341 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 05:32:33,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:33,342 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:33,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 159 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 05:32:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2021-11-20 05:32:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 116 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2021-11-20 05:32:33,346 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 45 [2021-11-20 05:32:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:33,347 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2021-11-20 05:32:33,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2021-11-20 05:32:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:32:33,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:33,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:33,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-20 05:32:33,348 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 560922323, now seen corresponding path program 1 times [2021-11-20 05:32:33,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:33,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024403051] [2021-11-20 05:32:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:33,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024403051] [2021-11-20 05:32:33,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024403051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281166910] [2021-11-20 05:32:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:33,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:33,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:33,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 05:32:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 05:32:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:33,606 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:33,607 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 05:32:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:34,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:34,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281166910] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:34,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:34,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2021-11-20 05:32:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152042171] [2021-11-20 05:32:34,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:34,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:32:34,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:32:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:32:34,523 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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 05:32:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:34,749 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-11-20 05:32:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:32:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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) Word has length 45 [2021-11-20 05:32:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:34,750 INFO L225 Difference]: With dead ends: 138 [2021-11-20 05:32:34,750 INFO L226 Difference]: Without dead ends: 138 [2021-11-20 05:32:34,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:32:34,752 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:34,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 180 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-20 05:32:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2021-11-20 05:32:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 121 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-11-20 05:32:34,756 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 45 [2021-11-20 05:32:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-11-20 05:32:34,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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 05:32:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-11-20 05:32:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:32:34,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:34,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:34,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:34,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:34,958 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2119524429, now seen corresponding path program 1 times [2021-11-20 05:32:34,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:34,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159003029] [2021-11-20 05:32:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:34,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:32:35,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:35,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159003029] [2021-11-20 05:32:35,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159003029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:35,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:35,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:32:35,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419088532] [2021-11-20 05:32:35,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:35,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:35,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:35,014 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 05:32:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:35,102 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-11-20 05:32:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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) Word has length 47 [2021-11-20 05:32:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:35,104 INFO L225 Difference]: With dead ends: 130 [2021-11-20 05:32:35,104 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 05:32:35,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:35,105 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:35,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 130 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 05:32:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2021-11-20 05:32:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 120 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 05:32:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2021-11-20 05:32:35,110 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 47 [2021-11-20 05:32:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:35,111 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2021-11-20 05:32:35,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 05:32:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2021-11-20 05:32:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:32:35,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:35,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:35,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-20 05:32:35,113 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2119524428, now seen corresponding path program 1 times [2021-11-20 05:32:35,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:35,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332655533] [2021-11-20 05:32:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:35,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:35,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332655533] [2021-11-20 05:32:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332655533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:35,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085524399] [2021-11-20 05:32:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:35,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:35,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 05:32:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 05:32:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:35,404 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:35,404 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 05:32:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:36,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:36,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085524399] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:36,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:36,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 12] total 31 [2021-11-20 05:32:36,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367644844] [2021-11-20 05:32:36,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:36,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:32:36,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:36,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:32:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:32:36,786 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 05:32:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:37,237 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2021-11-20 05:32:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:32:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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) Word has length 47 [2021-11-20 05:32:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:37,238 INFO L225 Difference]: With dead ends: 151 [2021-11-20 05:32:37,238 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 05:32:37,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 05:32:37,240 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 215 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:37,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 368 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 05:32:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2021-11-20 05:32:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2021-11-20 05:32:37,244 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 47 [2021-11-20 05:32:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:37,244 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2021-11-20 05:32:37,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 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 05:32:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2021-11-20 05:32:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 05:32:37,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:37,245 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:37,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:37,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:37,460 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:37,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1002087267, now seen corresponding path program 3 times [2021-11-20 05:32:37,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:37,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349475833] [2021-11-20 05:32:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:37,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:37,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349475833] [2021-11-20 05:32:37,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349475833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68227877] [2021-11-20 05:32:37,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:32:37,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:37,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:37,767 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:37,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 05:32:37,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:32:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 05:32:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:37,856 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 05:32:38,068 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 05:32:38,129 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:32:38,130 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 05:32:38,649 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:32:38,650 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 05:32:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:42,428 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 05:32:42,429 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 05:32:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68227877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:42,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2021-11-20 05:32:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246784959] [2021-11-20 05:32:42,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:42,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 05:32:42,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 05:32:42,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 05:32:42,608 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:43,110 INFO L93 Difference]: Finished difference Result 184 states and 211 transitions. [2021-11-20 05:32:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:32:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 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 47 [2021-11-20 05:32:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:43,112 INFO L225 Difference]: With dead ends: 184 [2021-11-20 05:32:43,112 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 05:32:43,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:32:43,113 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 49 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:43,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 994 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-20 05:32:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 05:32:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2021-11-20 05:32:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 175 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2021-11-20 05:32:43,118 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 47 [2021-11-20 05:32:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:43,118 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2021-11-20 05:32:43,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2021-11-20 05:32:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:32:43,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:43,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:43,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:43,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:43,334 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:43,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1048782252, now seen corresponding path program 1 times [2021-11-20 05:32:43,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:43,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485060426] [2021-11-20 05:32:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:43,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:32:43,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:43,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485060426] [2021-11-20 05:32:43,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485060426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:43,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:43,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:32:43,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076959058] [2021-11-20 05:32:43,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:43,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:43,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:43,381 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 05:32:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:43,443 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2021-11-20 05:32:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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) Word has length 49 [2021-11-20 05:32:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:43,445 INFO L225 Difference]: With dead ends: 188 [2021-11-20 05:32:43,445 INFO L226 Difference]: Without dead ends: 188 [2021-11-20 05:32:43,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:43,446 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:43,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 158 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-20 05:32:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2021-11-20 05:32:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 171 states have (on average 1.1754385964912282) internal successors, (201), 174 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2021-11-20 05:32:43,452 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 49 [2021-11-20 05:32:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2021-11-20 05:32:43,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 05:32:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2021-11-20 05:32:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 05:32:43,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:43,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:43,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-20 05:32:43,454 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1048782251, now seen corresponding path program 1 times [2021-11-20 05:32:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:43,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508571142] [2021-11-20 05:32:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:43,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:43,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:43,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508571142] [2021-11-20 05:32:43,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508571142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481057622] [2021-11-20 05:32:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:43,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:43,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:43,612 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:43,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 05:32:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 05:32:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:43,701 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:32:43,701 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 05:32:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:44,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:44,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481057622] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:44,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:32:44,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 10] total 29 [2021-11-20 05:32:44,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296391434] [2021-11-20 05:32:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:44,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:32:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:32:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:32:44,624 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:44,879 INFO L93 Difference]: Finished difference Result 231 states and 265 transitions. [2021-11-20 05:32:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:32:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 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 49 [2021-11-20 05:32:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:44,881 INFO L225 Difference]: With dead ends: 231 [2021-11-20 05:32:44,881 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 05:32:44,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:32:44,882 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 414 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:44,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 217 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:32:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 05:32:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 183. [2021-11-20 05:32:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 182 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 211 transitions. [2021-11-20 05:32:44,888 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 211 transitions. Word has length 49 [2021-11-20 05:32:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 211 transitions. [2021-11-20 05:32:44,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 211 transitions. [2021-11-20 05:32:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:32:44,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:44,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:44,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:45,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 05:32:45,111 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1733532468, now seen corresponding path program 1 times [2021-11-20 05:32:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:45,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864492356] [2021-11-20 05:32:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:45,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 05:32:45,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864492356] [2021-11-20 05:32:45,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864492356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:45,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:45,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 05:32:45,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123874484] [2021-11-20 05:32:45,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:45,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:32:45,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:32:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:32:45,207 INFO L87 Difference]: Start difference. First operand 183 states and 211 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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 05:32:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:45,266 INFO L93 Difference]: Finished difference Result 236 states and 269 transitions. [2021-11-20 05:32:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:32:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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) Word has length 51 [2021-11-20 05:32:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:45,268 INFO L225 Difference]: With dead ends: 236 [2021-11-20 05:32:45,268 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 05:32:45,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:32:45,270 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:45,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 05:32:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2021-11-20 05:32:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 223 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 257 transitions. [2021-11-20 05:32:45,278 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 257 transitions. Word has length 51 [2021-11-20 05:32:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:45,278 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 257 transitions. [2021-11-20 05:32:45,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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 05:32:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 257 transitions. [2021-11-20 05:32:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 05:32:45,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:45,280 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:45,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-20 05:32:45,280 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1890652506, now seen corresponding path program 4 times [2021-11-20 05:32:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219765025] [2021-11-20 05:32:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:45,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:45,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219765025] [2021-11-20 05:32:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219765025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670300787] [2021-11-20 05:32:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:32:45,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:45,447 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:45,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 05:32:45,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:32:45,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 05:32:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:45,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:46,149 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 05:32:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:46,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670300787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:46,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:46,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-20 05:32:46,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637936162] [2021-11-20 05:32:46,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:46,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:32:46,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:46,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:32:46,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:32:46,191 INFO L87 Difference]: Start difference. First operand 224 states and 257 transitions. Second operand has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 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 05:32:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:46,683 INFO L93 Difference]: Finished difference Result 353 states and 408 transitions. [2021-11-20 05:32:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:32:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 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 51 [2021-11-20 05:32:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:46,686 INFO L225 Difference]: With dead ends: 353 [2021-11-20 05:32:46,686 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 05:32:46,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:32:46,687 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 487 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:46,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 826 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:32:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 05:32:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 267. [2021-11-20 05:32:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 263 states have (on average 1.1863117870722433) internal successors, (312), 266 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2021-11-20 05:32:46,695 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 51 [2021-11-20 05:32:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2021-11-20 05:32:46,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 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 05:32:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2021-11-20 05:32:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 05:32:46,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:46,696 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:46,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:46,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:46,911 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1696379912, now seen corresponding path program 1 times [2021-11-20 05:32:46,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216111867] [2021-11-20 05:32:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:46,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 05:32:46,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:46,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216111867] [2021-11-20 05:32:46,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216111867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:32:46,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:32:46,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:32:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344659980] [2021-11-20 05:32:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:32:46,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:32:46,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:32:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:32:46,946 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 05:32:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:46,958 INFO L93 Difference]: Finished difference Result 270 states and 309 transitions. [2021-11-20 05:32:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:32:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) Word has length 52 [2021-11-20 05:32:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:46,960 INFO L225 Difference]: With dead ends: 270 [2021-11-20 05:32:46,960 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 05:32:46,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:32:46,961 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:46,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 171 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:32:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 05:32:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-20 05:32:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.1441048034934498) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-11-20 05:32:46,969 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 52 [2021-11-20 05:32:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-11-20 05:32:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 05:32:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-11-20 05:32:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 05:32:46,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:46,971 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:46,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-20 05:32:46,972 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:46,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash 269209443, now seen corresponding path program 5 times [2021-11-20 05:32:46,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:46,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729459977] [2021-11-20 05:32:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:46,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:47,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:47,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729459977] [2021-11-20 05:32:47,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729459977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:47,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582327293] [2021-11-20 05:32:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:32:47,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:47,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:47,692 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:47,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 05:32:47,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 05:32:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 05:32:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:48,234 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 05:32:48,299 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:32:48,299 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 05:32:49,485 INFO L354 Elim1Store]: treesize reduction 81, result has 16.5 percent of original size [2021-11-20 05:32:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 35 [2021-11-20 05:32:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:49,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:53,313 INFO L354 Elim1Store]: treesize reduction 57, result has 38.0 percent of original size [2021-11-20 05:32:53,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 219 treesize of output 199 [2021-11-20 05:32:53,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:53,335 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 161 treesize of output 155 [2021-11-20 05:32:53,379 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 20 treesize of output 18 [2021-11-20 05:32:53,421 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 43 treesize of output 39 [2021-11-20 05:32:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:32:53,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:32:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:32:53,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:53,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 118 [2021-11-20 05:32:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:32:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582327293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:54,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:54,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 53 [2021-11-20 05:32:54,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708701175] [2021-11-20 05:32:54,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:54,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 05:32:54,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 05:32:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2568, Unknown=5, NotChecked=0, Total=2756 [2021-11-20 05:32:54,653 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:55,982 INFO L93 Difference]: Finished difference Result 405 states and 453 transitions. [2021-11-20 05:32:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 05:32:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 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 05:32:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:55,985 INFO L225 Difference]: With dead ends: 405 [2021-11-20 05:32:55,985 INFO L226 Difference]: Without dead ends: 369 [2021-11-20 05:32:55,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=386, Invalid=4721, Unknown=5, NotChecked=0, Total=5112 [2021-11-20 05:32:55,988 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 325 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:55,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1906 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 658 Invalid, 0 Unknown, 348 Unchecked, 0.4s Time] [2021-11-20 05:32:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-20 05:32:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 307. [2021-11-20 05:32:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 306 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 345 transitions. [2021-11-20 05:32:55,997 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 345 transitions. Word has length 56 [2021-11-20 05:32:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:55,997 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 345 transitions. [2021-11-20 05:32:55,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:32:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 345 transitions. [2021-11-20 05:32:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 05:32:55,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:55,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:56,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:56,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 05:32:56,223 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:32:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2081403787, now seen corresponding path program 1 times [2021-11-20 05:32:56,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471669869] [2021-11-20 05:32:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:56,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 05:32:56,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471669869] [2021-11-20 05:32:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471669869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890348392] [2021-11-20 05:32:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:56,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:56,372 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:56,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 05:32:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 05:32:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:56,464 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 05:32:56,718 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 05:32:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 05:32:57,645 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-20 05:32:57,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 34 [2021-11-20 05:32:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:32:57,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:58,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) .cse0)))))) is different from false [2021-11-20 05:32:58,685 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:32:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-11-20 05:32:58,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:32:58,698 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 173 treesize of output 167 [2021-11-20 05:32:58,783 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 05:32:58,783 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 28 treesize of output 22 [2021-11-20 05:32:58,854 INFO L354 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2021-11-20 05:32:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 86 [2021-11-20 05:32:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:32:59,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890348392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:59,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:59,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 18] total 40 [2021-11-20 05:32:59,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877910449] [2021-11-20 05:32:59,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:59,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:32:59,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:32:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1371, Unknown=1, NotChecked=74, Total=1560 [2021-11-20 05:32:59,114 INFO L87 Difference]: Start difference. First operand 307 states and 345 transitions. Second operand has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:01,047 INFO L93 Difference]: Finished difference Result 448 states and 495 transitions. [2021-11-20 05:33:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:33:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 0 states have call successors, (0), 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 58 [2021-11-20 05:33:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:01,050 INFO L225 Difference]: With dead ends: 448 [2021-11-20 05:33:01,050 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 05:33:01,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=211, Invalid=2548, Unknown=1, NotChecked=102, Total=2862 [2021-11-20 05:33:01,052 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:01,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1238 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2021-11-20 05:33:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 05:33:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 367. [2021-11-20 05:33:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 363 states have (on average 1.140495867768595) internal successors, (414), 366 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 414 transitions. [2021-11-20 05:33:01,060 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 414 transitions. Word has length 58 [2021-11-20 05:33:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:01,061 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 414 transitions. [2021-11-20 05:33:01,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.3) internal successors, (132), 40 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 414 transitions. [2021-11-20 05:33:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 05:33:01,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:01,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:01,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:01,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 05:33:01,275 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:01,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2033507871, now seen corresponding path program 1 times [2021-11-20 05:33:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:01,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351918078] [2021-11-20 05:33:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:01,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:01,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:01,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351918078] [2021-11-20 05:33:01,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351918078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651051908] [2021-11-20 05:33:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:01,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:01,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:01,435 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 05:33:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:01,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 05:33:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:01,544 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:01,544 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 05:33:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:33:02,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:33:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651051908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:02,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:02,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 36 [2021-11-20 05:33:02,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190876540] [2021-11-20 05:33:02,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:02,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 05:33:02,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 05:33:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 05:33:02,921 INFO L87 Difference]: Start difference. First operand 367 states and 414 transitions. Second operand has 37 states, 36 states have (on average 4.0) internal successors, (144), 37 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:04,223 INFO L93 Difference]: Finished difference Result 446 states and 490 transitions. [2021-11-20 05:33:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 05:33:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.0) internal successors, (144), 37 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 05:33:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:04,226 INFO L225 Difference]: With dead ends: 446 [2021-11-20 05:33:04,227 INFO L226 Difference]: Without dead ends: 438 [2021-11-20 05:33:04,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=512, Invalid=2458, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 05:33:04,228 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 583 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:04,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 1259 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:33:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-20 05:33:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 356. [2021-11-20 05:33:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 352 states have (on average 1.1335227272727273) internal successors, (399), 355 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 399 transitions. [2021-11-20 05:33:04,238 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 399 transitions. Word has length 59 [2021-11-20 05:33:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:04,239 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 399 transitions. [2021-11-20 05:33:04,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.0) internal successors, (144), 37 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 399 transitions. [2021-11-20 05:33:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 05:33:04,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:04,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:04,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:04,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-20 05:33:04,455 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash -162234496, now seen corresponding path program 6 times [2021-11-20 05:33:04,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447594930] [2021-11-20 05:33:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:04,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:04,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447594930] [2021-11-20 05:33:04,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447594930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734844178] [2021-11-20 05:33:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:33:04,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:04,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:04,621 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:04,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 05:33:04,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 05:33:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 05:33:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:04,726 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:04,726 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 05:33:05,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:05,547 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 24 treesize of output 24 [2021-11-20 05:33:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:05,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:06,225 INFO L354 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2021-11-20 05:33:06,225 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 18 treesize of output 17 [2021-11-20 05:33:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734844178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2021-11-20 05:33:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252737085] [2021-11-20 05:33:07,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:07,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:33:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:33:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:33:07,003 INFO L87 Difference]: Start difference. First operand 356 states and 399 transitions. Second operand has 45 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 45 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:08,458 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2021-11-20 05:33:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:33:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 45 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 05:33:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:08,460 INFO L225 Difference]: With dead ends: 412 [2021-11-20 05:33:08,460 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 05:33:08,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=554, Invalid=3352, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 05:33:08,463 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 405 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:08,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1552 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1196 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2021-11-20 05:33:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 05:33:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 361. [2021-11-20 05:33:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 357 states have (on average 1.1316526610644257) internal successors, (404), 360 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 404 transitions. [2021-11-20 05:33:08,473 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 404 transitions. Word has length 60 [2021-11-20 05:33:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:08,473 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 404 transitions. [2021-11-20 05:33:08,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 45 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 404 transitions. [2021-11-20 05:33:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 05:33:08,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:08,475 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:08,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:08,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:08,699 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1912649417, now seen corresponding path program 7 times [2021-11-20 05:33:08,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:08,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636043620] [2021-11-20 05:33:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:08,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:09,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:09,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636043620] [2021-11-20 05:33:09,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636043620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:09,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510921959] [2021-11-20 05:33:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:33:09,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:09,076 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:09,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 05:33:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 05:33:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:09,204 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:09,204 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 05:33:09,781 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 05:33:09,854 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 05:33:09,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 05:33:10,682 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-20 05:33:10,682 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 51 treesize of output 34 [2021-11-20 05:33:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-11-20 05:33:11,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:33:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510921959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:11,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:11,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 21] total 54 [2021-11-20 05:33:11,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520169911] [2021-11-20 05:33:11,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:11,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 05:33:11,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 05:33:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 05:33:11,918 INFO L87 Difference]: Start difference. First operand 361 states and 404 transitions. Second operand has 54 states, 54 states have (on average 3.2037037037037037) internal successors, (173), 54 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:13,793 INFO L93 Difference]: Finished difference Result 723 states and 801 transitions. [2021-11-20 05:33:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 05:33:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.2037037037037037) internal successors, (173), 54 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 05:33:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:13,797 INFO L225 Difference]: With dead ends: 723 [2021-11-20 05:33:13,797 INFO L226 Difference]: Without dead ends: 667 [2021-11-20 05:33:13,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=620, Invalid=6690, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 05:33:13,800 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 334 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:13,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 3283 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1322 Invalid, 0 Unknown, 529 Unchecked, 0.6s Time] [2021-11-20 05:33:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-20 05:33:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 506. [2021-11-20 05:33:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.1354581673306774) internal successors, (570), 505 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 570 transitions. [2021-11-20 05:33:13,812 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 570 transitions. Word has length 65 [2021-11-20 05:33:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:13,813 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 570 transitions. [2021-11-20 05:33:13,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.2037037037037037) internal successors, (173), 54 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 570 transitions. [2021-11-20 05:33:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:33:13,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:13,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:13,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:14,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:14,035 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash 492825745, now seen corresponding path program 1 times [2021-11-20 05:33:14,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:14,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236315616] [2021-11-20 05:33:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:14,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:14,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:14,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236315616] [2021-11-20 05:33:14,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236315616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:14,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312870730] [2021-11-20 05:33:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:14,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:14,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:14,398 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:14,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 05:33:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 05:33:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:14,522 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 05:33:14,732 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 05:33:14,778 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:33:14,779 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 05:33:15,547 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:33:15,547 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 05:33:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:15,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:16,358 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| 1)) 0)) is different from false [2021-11-20 05:33:16,362 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 05:33:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:16,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312870730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:16,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:16,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-11-20 05:33:16,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174693048] [2021-11-20 05:33:16,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:16,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:33:16,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:33:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=955, Unknown=1, NotChecked=62, Total=1122 [2021-11-20 05:33:16,547 INFO L87 Difference]: Start difference. First operand 506 states and 570 transitions. Second operand has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 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 05:33:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:18,447 INFO L93 Difference]: Finished difference Result 523 states and 586 transitions. [2021-11-20 05:33:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:33:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 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 67 [2021-11-20 05:33:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:18,450 INFO L225 Difference]: With dead ends: 523 [2021-11-20 05:33:18,450 INFO L226 Difference]: Without dead ends: 458 [2021-11-20 05:33:18,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=214, Invalid=1858, Unknown=2, NotChecked=88, Total=2162 [2021-11-20 05:33:18,451 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 49 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:18,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 716 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 204 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2021-11-20 05:33:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-20 05:33:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-11-20 05:33:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 454 states have (on average 1.1409691629955947) internal successors, (518), 457 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 518 transitions. [2021-11-20 05:33:18,460 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 518 transitions. Word has length 67 [2021-11-20 05:33:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:18,460 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 518 transitions. [2021-11-20 05:33:18,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.588235294117647) internal successors, (156), 34 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 05:33:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 518 transitions. [2021-11-20 05:33:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 05:33:18,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:18,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:18,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:18,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:18,683 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1291149141, now seen corresponding path program 1 times [2021-11-20 05:33:18,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283549349] [2021-11-20 05:33:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:18,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:18,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283549349] [2021-11-20 05:33:18,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283549349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764829071] [2021-11-20 05:33:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:18,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:18,866 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:18,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 05:33:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:33:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:19,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:19,666 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 05:33:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:19,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764829071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:19,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:19,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-11-20 05:33:19,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501278795] [2021-11-20 05:33:19,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:19,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:33:19,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:19,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:33:19,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:33:19,707 INFO L87 Difference]: Start difference. First operand 458 states and 518 transitions. Second operand has 27 states, 26 states have (on average 5.269230769230769) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:20,307 INFO L93 Difference]: Finished difference Result 607 states and 681 transitions. [2021-11-20 05:33:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:33:20,308 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.269230769230769) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-20 05:33:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:20,310 INFO L225 Difference]: With dead ends: 607 [2021-11-20 05:33:20,310 INFO L226 Difference]: Without dead ends: 605 [2021-11-20 05:33:20,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:33:20,311 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 725 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:20,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 874 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:33:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-20 05:33:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 534. [2021-11-20 05:33:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 530 states have (on average 1.1452830188679246) internal successors, (607), 533 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 607 transitions. [2021-11-20 05:33:20,324 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 607 transitions. Word has length 67 [2021-11-20 05:33:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:20,324 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 607 transitions. [2021-11-20 05:33:20,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.269230769230769) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 607 transitions. [2021-11-20 05:33:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 05:33:20,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:20,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 05:33:20,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:20,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:20,551 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1370877155, now seen corresponding path program 2 times [2021-11-20 05:33:20,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543450480] [2021-11-20 05:33:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:20,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:20,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543450480] [2021-11-20 05:33:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543450480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:20,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739259479] [2021-11-20 05:33:20,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:33:20,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:20,755 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:20,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 05:33:20,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:33:20,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 05:33:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:20,852 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:20,852 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 05:33:21,394 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 05:33:21,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:21,922 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 30 treesize of output 34 [2021-11-20 05:33:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:22,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:22,850 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 57 treesize of output 51 [2021-11-20 05:33:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:33:24,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739259479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:24,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:24,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2021-11-20 05:33:24,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13082997] [2021-11-20 05:33:24,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:24,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 05:33:24,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 05:33:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:33:24,152 INFO L87 Difference]: Start difference. First operand 534 states and 607 transitions. Second operand has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:26,325 INFO L93 Difference]: Finished difference Result 766 states and 861 transitions. [2021-11-20 05:33:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:33:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 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 68 [2021-11-20 05:33:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:26,327 INFO L225 Difference]: With dead ends: 766 [2021-11-20 05:33:26,328 INFO L226 Difference]: Without dead ends: 766 [2021-11-20 05:33:26,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=972, Invalid=4430, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 05:33:26,328 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 564 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:26,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 1494 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 901 Invalid, 0 Unknown, 249 Unchecked, 0.5s Time] [2021-11-20 05:33:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-20 05:33:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 567. [2021-11-20 05:33:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 563 states have (on average 1.147424511545293) internal successors, (646), 566 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 646 transitions. [2021-11-20 05:33:26,342 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 646 transitions. Word has length 68 [2021-11-20 05:33:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:26,343 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 646 transitions. [2021-11-20 05:33:26,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 646 transitions. [2021-11-20 05:33:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 05:33:26,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:26,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:26,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:26,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 05:33:26,571 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1333006979, now seen corresponding path program 2 times [2021-11-20 05:33:26,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:26,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536199434] [2021-11-20 05:33:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:26,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:33:26,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536199434] [2021-11-20 05:33:26,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536199434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894226491] [2021-11-20 05:33:26,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:33:26,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:26,725 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:26,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 05:33:26,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:33:26,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 05:33:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:26,839 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:33:26,840 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 05:33:26,843 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 05:33:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:33:27,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:33:27,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894226491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:27,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:27,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2021-11-20 05:33:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978278753] [2021-11-20 05:33:27,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:27,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 05:33:27,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 05:33:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-20 05:33:27,790 INFO L87 Difference]: Start difference. First operand 567 states and 646 transitions. Second operand has 25 states, 24 states have (on average 5.375) internal successors, (129), 25 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:28,188 INFO L93 Difference]: Finished difference Result 756 states and 856 transitions. [2021-11-20 05:33:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:33:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.375) internal successors, (129), 25 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-20 05:33:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:28,191 INFO L225 Difference]: With dead ends: 756 [2021-11-20 05:33:28,191 INFO L226 Difference]: Without dead ends: 756 [2021-11-20 05:33:28,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:33:28,192 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 321 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:28,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 424 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:33:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-20 05:33:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 588. [2021-11-20 05:33:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 584 states have (on average 1.143835616438356) internal successors, (668), 587 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 668 transitions. [2021-11-20 05:33:28,205 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 668 transitions. Word has length 69 [2021-11-20 05:33:28,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 668 transitions. [2021-11-20 05:33:28,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.375) internal successors, (129), 25 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 668 transitions. [2021-11-20 05:33:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 05:33:28,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:28,207 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:28,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:28,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 05:33:28,435 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1188026188, now seen corresponding path program 8 times [2021-11-20 05:33:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441287177] [2021-11-20 05:33:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:28,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:28,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:28,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441287177] [2021-11-20 05:33:28,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441287177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998892684] [2021-11-20 05:33:28,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:33:28,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:28,671 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:28,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 05:33:28,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:33:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 05:33:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:29,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:29,622 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 05:33:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998892684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:29,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-11-20 05:33:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077896536] [2021-11-20 05:33:29,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 05:33:29,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 05:33:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-11-20 05:33:29,731 INFO L87 Difference]: Start difference. First operand 588 states and 668 transitions. Second operand has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:30,711 INFO L93 Difference]: Finished difference Result 808 states and 909 transitions. [2021-11-20 05:33:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:33:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-20 05:33:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:30,714 INFO L225 Difference]: With dead ends: 808 [2021-11-20 05:33:30,714 INFO L226 Difference]: Without dead ends: 808 [2021-11-20 05:33:30,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:33:30,715 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 749 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:30,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1934 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:33:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-20 05:33:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 668. [2021-11-20 05:33:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 664 states have (on average 1.1475903614457832) internal successors, (762), 667 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 762 transitions. [2021-11-20 05:33:30,733 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 762 transitions. Word has length 69 [2021-11-20 05:33:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:30,734 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 762 transitions. [2021-11-20 05:33:30,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 762 transitions. [2021-11-20 05:33:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 05:33:30,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:30,736 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:30,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:30,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-20 05:33:30,955 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1119450658, now seen corresponding path program 1 times [2021-11-20 05:33:30,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038919332] [2021-11-20 05:33:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:30,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:33:31,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038919332] [2021-11-20 05:33:31,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038919332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443578139] [2021-11-20 05:33:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:31,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:31,171 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:31,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 05:33:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:33:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:31,294 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:31,294 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 05:33:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:33:31,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:33:32,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443578139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:32,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:32,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-20 05:33:32,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770171835] [2021-11-20 05:33:32,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:32,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:33:32,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:33:32,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:33:32,496 INFO L87 Difference]: Start difference. First operand 668 states and 762 transitions. Second operand has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:33,289 INFO L93 Difference]: Finished difference Result 1508 states and 1701 transitions. [2021-11-20 05:33:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:33:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 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 71 [2021-11-20 05:33:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:33,295 INFO L225 Difference]: With dead ends: 1508 [2021-11-20 05:33:33,295 INFO L226 Difference]: Without dead ends: 1508 [2021-11-20 05:33:33,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=671, Invalid=2085, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:33:33,295 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 562 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:33,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 809 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:33:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-11-20 05:33:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1168. [2021-11-20 05:33:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1164 states have (on average 1.1537800687285222) internal successors, (1343), 1167 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1343 transitions. [2021-11-20 05:33:33,320 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1343 transitions. Word has length 71 [2021-11-20 05:33:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:33,321 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1343 transitions. [2021-11-20 05:33:33,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1343 transitions. [2021-11-20 05:33:33,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 05:33:33,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:33,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:33,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 05:33:33,544 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1419954798, now seen corresponding path program 1 times [2021-11-20 05:33:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886728737] [2021-11-20 05:33:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:33,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:33:33,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:33,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886728737] [2021-11-20 05:33:33,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886728737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:33,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518983466] [2021-11-20 05:33:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:33,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:33,879 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:33,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 05:33:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 05:33:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:34,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 05:33:34,781 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:33:34,781 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 37 treesize of output 36 [2021-11-20 05:33:36,456 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-11-20 05:33:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 05:33:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:36,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:37,299 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:33:37,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 243 treesize of output 192 [2021-11-20 05:33:37,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:37,315 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 188 treesize of output 180 [2021-11-20 05:33:37,358 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 05:33:37,358 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 28 treesize of output 22 [2021-11-20 05:33:37,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:33:37,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-20 05:33:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518983466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:38,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:38,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 31] total 75 [2021-11-20 05:33:38,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844298441] [2021-11-20 05:33:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 05:33:38,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 05:33:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=5169, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 05:33:38,245 INFO L87 Difference]: Start difference. First operand 1168 states and 1343 transitions. Second operand has 75 states, 75 states have (on average 2.533333333333333) internal successors, (190), 75 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:33:42,775 INFO L93 Difference]: Finished difference Result 1517 states and 1713 transitions. [2021-11-20 05:33:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 05:33:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.533333333333333) internal successors, (190), 75 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-20 05:33:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:33:42,785 INFO L225 Difference]: With dead ends: 1517 [2021-11-20 05:33:42,785 INFO L226 Difference]: Without dead ends: 1484 [2021-11-20 05:33:42,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5472 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1780, Invalid=19976, Unknown=0, NotChecked=0, Total=21756 [2021-11-20 05:33:42,787 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 883 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:33:42,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 3416 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2371 Invalid, 0 Unknown, 558 Unchecked, 1.0s Time] [2021-11-20 05:33:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-11-20 05:33:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1140. [2021-11-20 05:33:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1136 states have (on average 1.1522887323943662) internal successors, (1309), 1139 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1309 transitions. [2021-11-20 05:33:42,811 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1309 transitions. Word has length 74 [2021-11-20 05:33:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:33:42,811 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1309 transitions. [2021-11-20 05:33:42,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.533333333333333) internal successors, (190), 75 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:33:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1309 transitions. [2021-11-20 05:33:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 05:33:42,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:33:42,814 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:33:42,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 05:33:43,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 05:33:43,027 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:33:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:33:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash 136339069, now seen corresponding path program 9 times [2021-11-20 05:33:43,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:33:43,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926429012] [2021-11-20 05:33:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:33:43,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:33:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:33:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:33:43,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:33:43,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926429012] [2021-11-20 05:33:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926429012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:33:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400370266] [2021-11-20 05:33:43,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:33:43,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:33:43,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:33:43,445 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:33:43,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 05:33:43,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:33:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:33:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-20 05:33:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:33:43,612 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:33:43,612 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 05:33:43,622 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 05:33:44,552 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 05:33:44,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 05:33:45,936 INFO L354 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2021-11-20 05:33:45,937 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 55 treesize of output 35 [2021-11-20 05:33:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 52 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:33:47,510 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:33:47,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 107 [2021-11-20 05:33:47,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:47,520 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 71 treesize of output 73 [2021-11-20 05:33:47,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:33:47,545 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 8 treesize of output 4 [2021-11-20 05:33:47,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:33:47,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:33:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 59 [2021-11-20 05:33:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:33:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400370266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:33:53,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:33:53,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 28] total 72 [2021-11-20 05:33:53,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537278890] [2021-11-20 05:33:53,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:33:53,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 05:33:53,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:33:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 05:33:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=4692, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:33:53,277 INFO L87 Difference]: Start difference. First operand 1140 states and 1309 transitions. Second operand has 72 states, 72 states have (on average 2.875) internal successors, (207), 72 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:00,791 INFO L93 Difference]: Finished difference Result 1243 states and 1415 transitions. [2021-11-20 05:34:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-20 05:34:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.875) internal successors, (207), 72 states have internal predecessors, (207), 0 states have call successors, (0), 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 05:34:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:00,796 INFO L225 Difference]: With dead ends: 1243 [2021-11-20 05:34:00,796 INFO L226 Difference]: Without dead ends: 1143 [2021-11-20 05:34:00,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 5879 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2055, Invalid=21815, Unknown=0, NotChecked=0, Total=23870 [2021-11-20 05:34:00,799 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 435 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1853 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:00,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1853 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1308 Invalid, 0 Unknown, 742 Unchecked, 0.7s Time] [2021-11-20 05:34:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-11-20 05:34:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1102. [2021-11-20 05:34:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1098 states have (on average 1.1539162112932604) internal successors, (1267), 1101 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1267 transitions. [2021-11-20 05:34:00,816 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1267 transitions. Word has length 74 [2021-11-20 05:34:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:00,817 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1267 transitions. [2021-11-20 05:34:00,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.875) internal successors, (207), 72 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1267 transitions. [2021-11-20 05:34:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 05:34:00,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:00,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:00,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:01,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:01,047 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1093789664, now seen corresponding path program 1 times [2021-11-20 05:34:01,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:01,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451459154] [2021-11-20 05:34:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:01,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:34:01,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:01,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451459154] [2021-11-20 05:34:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451459154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:01,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080134466] [2021-11-20 05:34:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:01,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:01,267 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:01,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 05:34:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 05:34:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:01,382 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:34:01,382 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 05:34:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:34:02,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:34:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080134466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:02,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:02,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-11-20 05:34:02,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846686285] [2021-11-20 05:34:02,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:02,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 05:34:02,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 05:34:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:34:02,653 INFO L87 Difference]: Start difference. First operand 1102 states and 1267 transitions. Second operand has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:03,620 INFO L93 Difference]: Finished difference Result 1663 states and 1873 transitions. [2021-11-20 05:34:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:34:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 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 75 [2021-11-20 05:34:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:03,626 INFO L225 Difference]: With dead ends: 1663 [2021-11-20 05:34:03,626 INFO L226 Difference]: Without dead ends: 1663 [2021-11-20 05:34:03,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=826, Invalid=2714, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:34:03,627 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1131 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:03,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 874 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:34:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-20 05:34:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1120. [2021-11-20 05:34:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1116 states have (on average 1.1648745519713262) internal successors, (1300), 1119 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1300 transitions. [2021-11-20 05:34:03,648 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1300 transitions. Word has length 75 [2021-11-20 05:34:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:03,648 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1300 transitions. [2021-11-20 05:34:03,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 39 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1300 transitions. [2021-11-20 05:34:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 05:34:03,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:03,650 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:03,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:03,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:03,863 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1497014901, now seen corresponding path program 2 times [2021-11-20 05:34:03,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:03,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188834579] [2021-11-20 05:34:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:03,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:04,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:04,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188834579] [2021-11-20 05:34:04,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188834579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:04,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054518025] [2021-11-20 05:34:04,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:04,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:04,175 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:04,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 05:34:04,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:04,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 05:34:04,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:04,756 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 05:34:04,820 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:34:04,820 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 05:34:05,488 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 05:34:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:34:05,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:12,082 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:34:12,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 87 [2021-11-20 05:34:12,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:34:12,088 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 51 treesize of output 53 [2021-11-20 05:34:12,109 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 27 treesize of output 23 [2021-11-20 05:34:12,117 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 05:34:12,118 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 17 treesize of output 8 [2021-11-20 05:34:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:34:12,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054518025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:12,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:12,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 20] total 46 [2021-11-20 05:34:12,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881313541] [2021-11-20 05:34:12,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:12,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:34:12,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:34:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1891, Unknown=10, NotChecked=0, Total=2070 [2021-11-20 05:34:12,374 INFO L87 Difference]: Start difference. First operand 1120 states and 1300 transitions. Second operand has 46 states, 46 states have (on average 3.630434782608696) internal successors, (167), 46 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:13,197 INFO L93 Difference]: Finished difference Result 1193 states and 1374 transitions. [2021-11-20 05:34:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:34:13,198 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.630434782608696) internal successors, (167), 46 states have internal predecessors, (167), 0 states have call successors, (0), 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 76 [2021-11-20 05:34:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:13,201 INFO L225 Difference]: With dead ends: 1193 [2021-11-20 05:34:13,201 INFO L226 Difference]: Without dead ends: 1096 [2021-11-20 05:34:13,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=306, Invalid=3344, Unknown=10, NotChecked=0, Total=3660 [2021-11-20 05:34:13,203 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:13,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1555 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1091 Invalid, 0 Unknown, 14 Unchecked, 0.4s Time] [2021-11-20 05:34:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-20 05:34:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1090. [2021-11-20 05:34:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1086 states have (on average 1.1685082872928176) internal successors, (1269), 1089 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1269 transitions. [2021-11-20 05:34:13,222 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1269 transitions. Word has length 76 [2021-11-20 05:34:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:13,223 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1269 transitions. [2021-11-20 05:34:13,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.630434782608696) internal successors, (167), 46 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1269 transitions. [2021-11-20 05:34:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 05:34:13,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:13,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:13,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 05:34:13,449 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -839159297, now seen corresponding path program 3 times [2021-11-20 05:34:13,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:13,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888572653] [2021-11-20 05:34:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:13,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:34:13,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888572653] [2021-11-20 05:34:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888572653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:13,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982020956] [2021-11-20 05:34:13,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:13,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:13,620 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:13,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 05:34:13,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:34:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-20 05:34:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:13,757 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:34:13,757 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 05:34:13,767 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 05:34:14,168 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 05:34:14,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 05:34:15,198 INFO L354 Elim1Store]: treesize reduction 66, result has 22.4 percent of original size [2021-11-20 05:34:15,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 39 [2021-11-20 05:34:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:34:15,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:16,465 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:34:16,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-11-20 05:34:16,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:34:16,473 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 173 treesize of output 167 [2021-11-20 05:34:16,492 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 05:34:16,493 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 146 treesize of output 137 [2021-11-20 05:34:16,551 INFO L354 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2021-11-20 05:34:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 99 [2021-11-20 05:34:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 05:34:17,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982020956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:17,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:17,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19, 18] total 45 [2021-11-20 05:34:17,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279194406] [2021-11-20 05:34:17,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:17,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:34:17,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:34:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1837, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:34:17,425 INFO L87 Difference]: Start difference. First operand 1090 states and 1269 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:27,109 INFO L93 Difference]: Finished difference Result 2416 states and 2730 transitions. [2021-11-20 05:34:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-20 05:34:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 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 77 [2021-11-20 05:34:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:27,117 INFO L225 Difference]: With dead ends: 2416 [2021-11-20 05:34:27,117 INFO L226 Difference]: Without dead ends: 2365 [2021-11-20 05:34:27,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6165 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2702, Invalid=19648, Unknown=0, NotChecked=0, Total=22350 [2021-11-20 05:34:27,118 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 2836 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1803 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2836 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 1803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:27,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2836 Valid, 1668 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 1803 Invalid, 0 Unknown, 258 Unchecked, 1.3s Time] [2021-11-20 05:34:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-11-20 05:34:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1592. [2021-11-20 05:34:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1588 states have (on average 1.1448362720403022) internal successors, (1818), 1591 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1818 transitions. [2021-11-20 05:34:27,171 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1818 transitions. Word has length 77 [2021-11-20 05:34:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:27,172 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1818 transitions. [2021-11-20 05:34:27,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1818 transitions. [2021-11-20 05:34:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 05:34:27,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:27,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:27,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:27,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-20 05:34:27,395 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:27,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1083596167, now seen corresponding path program 3 times [2021-11-20 05:34:27,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:27,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411465098] [2021-11-20 05:34:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:27,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411465098] [2021-11-20 05:34:27,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411465098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758749999] [2021-11-20 05:34:27,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:27,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:27,617 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:27,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 05:34:27,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:34:27,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:34:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:27,743 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 05:34:27,747 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 05:34:28,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:34:28,130 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:34:28,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:34:28,729 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:34:28,729 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 37 treesize of output 24 [2021-11-20 05:34:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:34:28,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:29,584 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 05:34:29,588 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 05:34:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:34:29,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758749999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:29,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:29,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 33 [2021-11-20 05:34:29,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862115576] [2021-11-20 05:34:29,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:29,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:34:29,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:34:29,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:34:29,793 INFO L87 Difference]: Start difference. First operand 1592 states and 1818 transitions. Second operand has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:31,318 INFO L93 Difference]: Finished difference Result 2278 states and 2569 transitions. [2021-11-20 05:34:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:34:31,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 05:34:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:31,325 INFO L225 Difference]: With dead ends: 2278 [2021-11-20 05:34:31,326 INFO L226 Difference]: Without dead ends: 2278 [2021-11-20 05:34:31,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=540, Invalid=4016, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 05:34:31,326 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 168 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:31,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1413 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1141 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2021-11-20 05:34:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-11-20 05:34:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1626. [2021-11-20 05:34:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1622 states have (on average 1.1442663378545006) internal successors, (1856), 1625 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 1856 transitions. [2021-11-20 05:34:31,359 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 1856 transitions. Word has length 77 [2021-11-20 05:34:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 1856 transitions. [2021-11-20 05:34:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.363636363636363) internal successors, (144), 34 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 1856 transitions. [2021-11-20 05:34:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 05:34:31,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:31,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:31,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-20 05:34:31,575 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1469280949, now seen corresponding path program 2 times [2021-11-20 05:34:31,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:31,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313079413] [2021-11-20 05:34:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:31,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:34:31,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:31,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313079413] [2021-11-20 05:34:31,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313079413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:31,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885971632] [2021-11-20 05:34:31,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:31,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:31,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:31,763 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:31,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 05:34:31,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:31,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 05:34:31,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:34:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:32,532 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 05:34:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:34:32,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885971632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:32,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:32,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2021-11-20 05:34:32,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009563936] [2021-11-20 05:34:32,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:32,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 05:34:32,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 05:34:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-20 05:34:32,613 INFO L87 Difference]: Start difference. First operand 1626 states and 1856 transitions. Second operand has 28 states, 27 states have (on average 5.0) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:33,400 INFO L93 Difference]: Finished difference Result 2149 states and 2402 transitions. [2021-11-20 05:34:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:34:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.0) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 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 78 [2021-11-20 05:34:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:33,409 INFO L225 Difference]: With dead ends: 2149 [2021-11-20 05:34:33,409 INFO L226 Difference]: Without dead ends: 2149 [2021-11-20 05:34:33,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1552, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:34:33,410 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 726 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:33,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 1017 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:34:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-11-20 05:34:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1626. [2021-11-20 05:34:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1622 states have (on average 1.1368680641183724) internal successors, (1844), 1625 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 1844 transitions. [2021-11-20 05:34:33,431 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 1844 transitions. Word has length 78 [2021-11-20 05:34:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:33,431 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 1844 transitions. [2021-11-20 05:34:33,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.0) internal successors, (135), 28 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 1844 transitions. [2021-11-20 05:34:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:34:33,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:33,434 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:33,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:33,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-20 05:34:33,650 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1380221382, now seen corresponding path program 1 times [2021-11-20 05:34:33,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:33,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340862732] [2021-11-20 05:34:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:33,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:33,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340862732] [2021-11-20 05:34:33,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340862732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725912937] [2021-11-20 05:34:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:33,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:33,843 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:33,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 05:34:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:34:33,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:34,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:34,694 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 05:34:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:34,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725912937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:34,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:34,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-11-20 05:34:34,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230921908] [2021-11-20 05:34:34,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:34,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:34:34,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:34:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-11-20 05:34:34,727 INFO L87 Difference]: Start difference. First operand 1626 states and 1844 transitions. Second operand has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:35,298 INFO L93 Difference]: Finished difference Result 1855 states and 2081 transitions. [2021-11-20 05:34:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:34:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 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 81 [2021-11-20 05:34:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:35,309 INFO L225 Difference]: With dead ends: 1855 [2021-11-20 05:34:35,309 INFO L226 Difference]: Without dead ends: 1855 [2021-11-20 05:34:35,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:34:35,310 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 668 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:35,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 892 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:34:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-20 05:34:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1411. [2021-11-20 05:34:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1407 states have (on average 1.138592750533049) internal successors, (1602), 1410 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1602 transitions. [2021-11-20 05:34:35,354 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1602 transitions. Word has length 81 [2021-11-20 05:34:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:35,354 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 1602 transitions. [2021-11-20 05:34:35,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1602 transitions. [2021-11-20 05:34:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 05:34:35,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:35,356 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:35,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:35,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:35,577 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:35,578 INFO L85 PathProgramCache]: Analyzing trace with hash -440733000, now seen corresponding path program 2 times [2021-11-20 05:34:35,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:35,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365765334] [2021-11-20 05:34:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:35,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:35,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365765334] [2021-11-20 05:34:35,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365765334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:35,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112835404] [2021-11-20 05:34:35,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:35,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:35,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:35,990 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:36,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 05:34:36,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:36,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 05:34:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:36,101 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 05:34:36,513 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 05:34:36,574 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:34:36,575 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 05:34:37,596 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:34:37,596 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 05:34:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:37,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:42,661 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 05:34:42,662 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 05:34:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112835404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:43,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:43,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 46 [2021-11-20 05:34:43,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100923350] [2021-11-20 05:34:43,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:43,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:34:43,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:34:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:34:43,005 INFO L87 Difference]: Start difference. First operand 1411 states and 1602 transitions. Second operand has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 46 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 05:34:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:43,771 INFO L93 Difference]: Finished difference Result 1902 states and 2154 transitions. [2021-11-20 05:34:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:34:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 46 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) Word has length 81 [2021-11-20 05:34:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:43,779 INFO L225 Difference]: With dead ends: 1902 [2021-11-20 05:34:43,779 INFO L226 Difference]: Without dead ends: 1828 [2021-11-20 05:34:43,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=252, Invalid=3288, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:34:43,780 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 319 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 3225 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 516 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:43,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 3225 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 782 Invalid, 0 Unknown, 516 Unchecked, 0.3s Time] [2021-11-20 05:34:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-11-20 05:34:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1533. [2021-11-20 05:34:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1529 states have (on average 1.1379986919555265) internal successors, (1740), 1532 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 1740 transitions. [2021-11-20 05:34:43,795 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 1740 transitions. Word has length 81 [2021-11-20 05:34:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:43,795 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 1740 transitions. [2021-11-20 05:34:43,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.869565217391304) internal successors, (178), 46 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 05:34:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 1740 transitions. [2021-11-20 05:34:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 05:34:43,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:43,798 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:43,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:44,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-20 05:34:44,011 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:44,011 INFO L85 PathProgramCache]: Analyzing trace with hash -86779040, now seen corresponding path program 3 times [2021-11-20 05:34:44,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:44,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178259423] [2021-11-20 05:34:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:44,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:34:44,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178259423] [2021-11-20 05:34:44,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178259423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086675220] [2021-11-20 05:34:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:44,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:44,341 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:44,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 05:34:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:34:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:34:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:44,466 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:34:44,466 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 05:34:44,475 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 05:34:44,944 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 05:34:44,992 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 05:34:44,992 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 05:34:45,950 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 05:34:45,951 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 05:34:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:34:46,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:46,942 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 33 treesize of output 31 [2021-11-20 05:34:46,944 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 43 treesize of output 39 [2021-11-20 05:34:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:34:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086675220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:47,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:47,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 45 [2021-11-20 05:34:47,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586874640] [2021-11-20 05:34:47,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:47,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:34:47,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:34:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:34:47,410 INFO L87 Difference]: Start difference. First operand 1533 states and 1740 transitions. Second operand has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:48,702 INFO L93 Difference]: Finished difference Result 1884 states and 2107 transitions. [2021-11-20 05:34:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:34:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-20 05:34:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:48,711 INFO L225 Difference]: With dead ends: 1884 [2021-11-20 05:34:48,711 INFO L226 Difference]: Without dead ends: 1864 [2021-11-20 05:34:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=426, Invalid=4544, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 05:34:48,712 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 145 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1537 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2021-11-20 05:34:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-11-20 05:34:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1626. [2021-11-20 05:34:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1622 states have (on average 1.1344019728729964) internal successors, (1840), 1625 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 1840 transitions. [2021-11-20 05:34:48,730 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 1840 transitions. Word has length 83 [2021-11-20 05:34:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:48,730 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 1840 transitions. [2021-11-20 05:34:48,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 1840 transitions. [2021-11-20 05:34:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 05:34:48,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:48,733 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:48,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:48,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-20 05:34:48,955 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1332029943, now seen corresponding path program 3 times [2021-11-20 05:34:48,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:48,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862049021] [2021-11-20 05:34:48,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:48,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:34:49,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862049021] [2021-11-20 05:34:49,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862049021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735505487] [2021-11-20 05:34:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:49,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:49,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:49,831 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:49,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 05:34:49,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:34:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 05:34:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:49,995 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 05:34:50,000 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 05:34:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:34:50,390 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:34:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:34:51,229 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:34:51,230 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 37 treesize of output 24 [2021-11-20 05:34:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 05:34:51,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:52,374 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 33 treesize of output 31 [2021-11-20 05:34:52,376 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 43 treesize of output 39 [2021-11-20 05:34:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 05:34:52,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735505487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:52,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:52,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 13] total 50 [2021-11-20 05:34:52,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346327244] [2021-11-20 05:34:52,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:52,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 05:34:52,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 05:34:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2271, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:34:52,831 INFO L87 Difference]: Start difference. First operand 1626 states and 1840 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:54,921 INFO L93 Difference]: Finished difference Result 2083 states and 2335 transitions. [2021-11-20 05:34:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 05:34:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 85 [2021-11-20 05:34:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:54,925 INFO L225 Difference]: With dead ends: 2083 [2021-11-20 05:34:54,925 INFO L226 Difference]: Without dead ends: 2061 [2021-11-20 05:34:54,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=614, Invalid=7042, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 05:34:54,927 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 149 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:54,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 1761 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 893 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2021-11-20 05:34:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-11-20 05:34:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1964. [2021-11-20 05:34:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1960 states have (on average 1.1306122448979592) internal successors, (2216), 1963 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2216 transitions. [2021-11-20 05:34:54,949 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2216 transitions. Word has length 85 [2021-11-20 05:34:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:54,950 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 2216 transitions. [2021-11-20 05:34:54,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:34:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2216 transitions. [2021-11-20 05:34:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 05:34:54,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:54,952 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:54,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:55,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:55,167 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:34:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1086935749, now seen corresponding path program 3 times [2021-11-20 05:34:55,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:55,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670603602] [2021-11-20 05:34:55,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:55,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:34:55,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670603602] [2021-11-20 05:34:55,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670603602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:34:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344480211] [2021-11-20 05:34:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:55,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:55,396 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 05:34:55,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:34:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 05:34:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:55,529 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 05:34:55,534 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 05:34:55,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:34:55,938 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:34:55,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:34:56,413 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:34:56,413 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 37 treesize of output 24 [2021-11-20 05:34:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-20 05:34:56,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:57,264 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 05:34:57,267 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 41 treesize of output 37 [2021-11-20 05:34:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-20 05:34:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344480211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:57,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:34:57,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 33 [2021-11-20 05:34:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757001918] [2021-11-20 05:34:57,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:34:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:34:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:34:57,480 INFO L87 Difference]: Start difference. First operand 1964 states and 2216 transitions. Second operand has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 34 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 05:35:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:00,680 INFO L93 Difference]: Finished difference Result 2006 states and 2258 transitions. [2021-11-20 05:35:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:35:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 34 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-20 05:35:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:00,682 INFO L225 Difference]: With dead ends: 2006 [2021-11-20 05:35:00,682 INFO L226 Difference]: Without dead ends: 2006 [2021-11-20 05:35:00,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=581, Invalid=3579, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 05:35:00,683 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 92 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:00,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 996 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 514 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2021-11-20 05:35:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-11-20 05:35:00,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1946. [2021-11-20 05:35:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1942 states have (on average 1.128733264675592) internal successors, (2192), 1945 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2192 transitions. [2021-11-20 05:35:00,699 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2192 transitions. Word has length 85 [2021-11-20 05:35:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:00,700 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2192 transitions. [2021-11-20 05:35:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.545454545454546) internal successors, (150), 34 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 05:35:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2192 transitions. [2021-11-20 05:35:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 05:35:00,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:00,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:00,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:00,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:00,919 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:00,919 INFO L85 PathProgramCache]: Analyzing trace with hash -146378871, now seen corresponding path program 4 times [2021-11-20 05:35:00,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564343192] [2021-11-20 05:35:00,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:00,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 05:35:01,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:01,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564343192] [2021-11-20 05:35:01,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564343192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:01,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375907475] [2021-11-20 05:35:01,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:35:01,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:01,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:01,114 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:01,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 05:35:01,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:35:01,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 05:35:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:01,233 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:35:01,234 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 05:35:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 05:35:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 05:35:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375907475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:02,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:02,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2021-11-20 05:35:02,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972905370] [2021-11-20 05:35:02,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:02,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:35:02,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:35:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:35:02,015 INFO L87 Difference]: Start difference. First operand 1946 states and 2192 transitions. Second operand has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 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 05:35:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:02,464 INFO L93 Difference]: Finished difference Result 2896 states and 3248 transitions. [2021-11-20 05:35:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:35:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 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 88 [2021-11-20 05:35:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:02,468 INFO L225 Difference]: With dead ends: 2896 [2021-11-20 05:35:02,468 INFO L226 Difference]: Without dead ends: 2888 [2021-11-20 05:35:02,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1682, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:35:02,469 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 741 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:02,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 586 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:35:02,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2021-11-20 05:35:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2018. [2021-11-20 05:35:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2014 states have (on average 1.1276067527308837) internal successors, (2271), 2017 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2271 transitions. [2021-11-20 05:35:02,502 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2271 transitions. Word has length 88 [2021-11-20 05:35:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:02,502 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 2271 transitions. [2021-11-20 05:35:02,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.611111111111111) internal successors, (130), 36 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 05:35:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2271 transitions. [2021-11-20 05:35:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 05:35:02,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:02,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:02,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-20 05:35:02,705 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash 258190664, now seen corresponding path program 1 times [2021-11-20 05:35:02,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:02,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509201812] [2021-11-20 05:35:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:02,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:35:02,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509201812] [2021-11-20 05:35:02,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509201812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906844571] [2021-11-20 05:35:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:02,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:02,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:02,820 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:02,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 05:35:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:02,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 05:35:02,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:02,969 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:35:02,970 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 05:35:03,534 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 05:35:03,612 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 05:35:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 05:35:06,940 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-20 05:35:06,941 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 51 treesize of output 34 [2021-11-20 05:35:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:35:06,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:07,467 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 23 treesize of output 21 [2021-11-20 05:35:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:35:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:35:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906844571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:08,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 22] total 51 [2021-11-20 05:35:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962901367] [2021-11-20 05:35:08,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:08,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:35:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:35:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2319, Unknown=1, NotChecked=0, Total=2550 [2021-11-20 05:35:08,320 INFO L87 Difference]: Start difference. First operand 2018 states and 2271 transitions. Second operand has 51 states, 51 states have (on average 4.372549019607843) internal successors, (223), 51 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 05:35:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:11,392 INFO L93 Difference]: Finished difference Result 2367 states and 2610 transitions. [2021-11-20 05:35:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 05:35:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.372549019607843) internal successors, (223), 51 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 05:35:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:11,395 INFO L225 Difference]: With dead ends: 2367 [2021-11-20 05:35:11,395 INFO L226 Difference]: Without dead ends: 2317 [2021-11-20 05:35:11,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=494, Invalid=6644, Unknown=2, NotChecked=0, Total=7140 [2021-11-20 05:35:11,396 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 258 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1437 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:11,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 3002 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1050 Invalid, 0 Unknown, 1437 Unchecked, 0.5s Time] [2021-11-20 05:35:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-20 05:35:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1798. [2021-11-20 05:35:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1794 states have (on average 1.120958751393534) internal successors, (2011), 1797 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2011 transitions. [2021-11-20 05:35:11,424 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2011 transitions. Word has length 89 [2021-11-20 05:35:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 2011 transitions. [2021-11-20 05:35:11,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.372549019607843) internal successors, (223), 51 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 05:35:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2011 transitions. [2021-11-20 05:35:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:35:11,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:11,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:11,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:11,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:11,631 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -150095202, now seen corresponding path program 2 times [2021-11-20 05:35:11,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:11,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12122986] [2021-11-20 05:35:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:11,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:35:12,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12122986] [2021-11-20 05:35:12,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12122986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:12,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129647240] [2021-11-20 05:35:12,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:35:12,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:12,027 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 05:35:12,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:35:12,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-20 05:35:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:12,153 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:35:12,154 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 05:35:12,721 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 05:35:12,782 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-11-20 05:35:12,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:35:14,477 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 05:35:14,478 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 45 treesize of output 27 [2021-11-20 05:35:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:35:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:15,916 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 76 treesize of output 70 [2021-11-20 05:35:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:35:20,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129647240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:20,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:20,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 23] total 61 [2021-11-20 05:35:20,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974955000] [2021-11-20 05:35:20,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:20,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 05:35:20,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 05:35:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3435, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:35:20,424 INFO L87 Difference]: Start difference. First operand 1798 states and 2011 transitions. Second operand has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:21,595 INFO L93 Difference]: Finished difference Result 1959 states and 2173 transitions. [2021-11-20 05:35:21,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:35:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-20 05:35:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:21,603 INFO L225 Difference]: With dead ends: 1959 [2021-11-20 05:35:21,604 INFO L226 Difference]: Without dead ends: 1893 [2021-11-20 05:35:21,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=361, Invalid=5645, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 05:35:21,605 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 222 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:21,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1830 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 809 Invalid, 0 Unknown, 478 Unchecked, 0.3s Time] [2021-11-20 05:35:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-11-20 05:35:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1800. [2021-11-20 05:35:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1796 states have (on average 1.1202672605790647) internal successors, (2012), 1799 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2012 transitions. [2021-11-20 05:35:21,627 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2012 transitions. Word has length 90 [2021-11-20 05:35:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:21,627 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2012 transitions. [2021-11-20 05:35:21,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2012 transitions. [2021-11-20 05:35:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 05:35:21,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:21,630 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:21,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:21,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:21,839 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1761619874, now seen corresponding path program 3 times [2021-11-20 05:35:21,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562868301] [2021-11-20 05:35:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:21,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 05:35:22,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562868301] [2021-11-20 05:35:22,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562868301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922455520] [2021-11-20 05:35:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:35:22,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:22,059 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:22,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 05:35:22,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:35:22,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 05:35:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:22,183 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:35:22,183 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 05:35:22,218 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 05:35:22,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:35:22,768 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:35:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:35:23,366 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:35:23,366 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 37 treesize of output 24 [2021-11-20 05:35:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:35:23,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:24,322 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 05:35:24,324 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 05:35:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:35:24,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922455520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:24,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:24,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-11-20 05:35:24,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936102937] [2021-11-20 05:35:24,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:24,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 05:35:24,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 05:35:24,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 05:35:24,745 INFO L87 Difference]: Start difference. First operand 1800 states and 2012 transitions. Second operand has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:25,935 INFO L93 Difference]: Finished difference Result 1885 states and 2100 transitions. [2021-11-20 05:35:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:35:25,936 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-20 05:35:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:25,938 INFO L225 Difference]: With dead ends: 1885 [2021-11-20 05:35:25,938 INFO L226 Difference]: Without dead ends: 1679 [2021-11-20 05:35:25,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=623, Invalid=4069, Unknown=0, NotChecked=0, Total=4692 [2021-11-20 05:35:25,939 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 134 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:25,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 971 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 402 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-11-20 05:35:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-11-20 05:35:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1627. [2021-11-20 05:35:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1623 states have (on average 1.117683302526186) internal successors, (1814), 1626 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 1814 transitions. [2021-11-20 05:35:25,959 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 1814 transitions. Word has length 90 [2021-11-20 05:35:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:25,959 INFO L470 AbstractCegarLoop]: Abstraction has 1627 states and 1814 transitions. [2021-11-20 05:35:25,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 1814 transitions. [2021-11-20 05:35:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 05:35:25,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:25,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:25,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:26,187 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1079263130, now seen corresponding path program 5 times [2021-11-20 05:35:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:26,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885932284] [2021-11-20 05:35:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:26,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:35:26,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885932284] [2021-11-20 05:35:26,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885932284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:26,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091425933] [2021-11-20 05:35:26,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:35:26,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:26,363 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:26,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-20 05:35:26,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:35:26,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 05:35:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:26,857 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:35:26,857 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 05:35:26,859 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 05:35:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:35:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:35:27,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091425933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:27,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:27,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 34 [2021-11-20 05:35:27,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223751606] [2021-11-20 05:35:27,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:27,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:35:27,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:35:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:35:27,734 INFO L87 Difference]: Start difference. First operand 1627 states and 1814 transitions. Second operand has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 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 05:35:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:29,412 INFO L93 Difference]: Finished difference Result 2548 states and 2802 transitions. [2021-11-20 05:35:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 05:35:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 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 92 [2021-11-20 05:35:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:29,415 INFO L225 Difference]: With dead ends: 2548 [2021-11-20 05:35:29,416 INFO L226 Difference]: Without dead ends: 2483 [2021-11-20 05:35:29,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=878, Invalid=4378, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 05:35:29,416 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1066 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:29,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1923 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:35:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-11-20 05:35:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2202. [2021-11-20 05:35:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2198 states have (on average 1.1173794358507734) internal successors, (2456), 2201 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 2456 transitions. [2021-11-20 05:35:29,444 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 2456 transitions. Word has length 92 [2021-11-20 05:35:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 2456 transitions. [2021-11-20 05:35:29,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 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 05:35:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 2456 transitions. [2021-11-20 05:35:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-20 05:35:29,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:29,447 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:29,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:29,663 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1572746467, now seen corresponding path program 1 times [2021-11-20 05:35:29,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709247861] [2021-11-20 05:35:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:29,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:35:30,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709247861] [2021-11-20 05:35:30,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709247861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:30,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276727830] [2021-11-20 05:35:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:30,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:30,003 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:30,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-20 05:35:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-20 05:35:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:30,714 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 05:35:30,770 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:35:30,770 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 05:35:32,645 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-11-20 05:35:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 29 [2021-11-20 05:35:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:35:32,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:33,317 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:35:33,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-11-20 05:35:33,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:35:33,324 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 173 treesize of output 167 [2021-11-20 05:35:33,354 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 66 treesize of output 58 [2021-11-20 05:35:33,365 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 05:35:33,366 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 17 treesize of output 11 [2021-11-20 05:35:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 05:35:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276727830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:33,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:33,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 21] total 61 [2021-11-20 05:35:33,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906605227] [2021-11-20 05:35:33,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 05:35:33,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 05:35:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3435, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:35:33,758 INFO L87 Difference]: Start difference. First operand 2202 states and 2456 transitions. Second operand has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:34,848 INFO L93 Difference]: Finished difference Result 2206 states and 2459 transitions. [2021-11-20 05:35:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:35:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 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 95 [2021-11-20 05:35:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:34,851 INFO L225 Difference]: With dead ends: 2206 [2021-11-20 05:35:34,851 INFO L226 Difference]: Without dead ends: 2116 [2021-11-20 05:35:34,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=452, Invalid=5868, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 05:35:34,853 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:34,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1707 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 921 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2021-11-20 05:35:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-20 05:35:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2116. [2021-11-20 05:35:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2112 states have (on average 1.1202651515151516) internal successors, (2366), 2115 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 2366 transitions. [2021-11-20 05:35:34,878 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 2366 transitions. Word has length 95 [2021-11-20 05:35:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:34,878 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 2366 transitions. [2021-11-20 05:35:34,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8524590163934427) internal successors, (235), 61 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 2366 transitions. [2021-11-20 05:35:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:35:34,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:34,881 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:34,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:35,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:35,095 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 693578601, now seen corresponding path program 2 times [2021-11-20 05:35:35,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:35,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413580488] [2021-11-20 05:35:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:35,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:35:35,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:35,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413580488] [2021-11-20 05:35:35,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413580488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:35,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381565934] [2021-11-20 05:35:35,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:35:35,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:35,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:35,428 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:35,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-20 05:35:35,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:35:35,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:35:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:35,523 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 05:35:35,975 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 05:35:36,026 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:35:36,027 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 05:35:38,059 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:35:38,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-11-20 05:35:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:35:38,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:40,485 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 05:35:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:35:41,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381565934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:41,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:41,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 45 [2021-11-20 05:35:41,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287386539] [2021-11-20 05:35:41,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:41,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:35:41,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:35:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1839, Unknown=1, NotChecked=0, Total=1980 [2021-11-20 05:35:41,124 INFO L87 Difference]: Start difference. First operand 2116 states and 2366 transitions. Second operand has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 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 05:35:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:41,708 INFO L93 Difference]: Finished difference Result 2221 states and 2474 transitions. [2021-11-20 05:35:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:35:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:35:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:41,711 INFO L225 Difference]: With dead ends: 2221 [2021-11-20 05:35:41,711 INFO L226 Difference]: Without dead ends: 2215 [2021-11-20 05:35:41,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=241, Invalid=2838, Unknown=1, NotChecked=0, Total=3080 [2021-11-20 05:35:41,712 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 79 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:41,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1423 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-11-20 05:35:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-11-20 05:35:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2155. [2021-11-20 05:35:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2151 states have (on average 1.1194793119479312) internal successors, (2408), 2154 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2408 transitions. [2021-11-20 05:35:41,747 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2408 transitions. Word has length 96 [2021-11-20 05:35:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:41,747 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 2408 transitions. [2021-11-20 05:35:41,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.2444444444444445) internal successors, (191), 45 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 05:35:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2408 transitions. [2021-11-20 05:35:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 05:35:41,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:41,750 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 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 05:35:41,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:41,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:41,970 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:41,971 INFO L85 PathProgramCache]: Analyzing trace with hash 524539591, now seen corresponding path program 6 times [2021-11-20 05:35:41,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:41,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582041941] [2021-11-20 05:35:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:41,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 05:35:42,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582041941] [2021-11-20 05:35:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582041941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927319322] [2021-11-20 05:35:42,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:35:42,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:42,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:42,194 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:42,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-20 05:35:42,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 05:35:42,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:42,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 05:35:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:42,364 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:35:42,365 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 05:35:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 05:35:42,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 05:35:43,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927319322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:43,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:43,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2021-11-20 05:35:43,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905787885] [2021-11-20 05:35:43,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:43,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:35:43,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:35:43,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:35:43,396 INFO L87 Difference]: Start difference. First operand 2155 states and 2408 transitions. Second operand has 40 states, 40 states have (on average 3.75) internal successors, (150), 40 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 05:35:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:43,881 INFO L93 Difference]: Finished difference Result 3663 states and 4062 transitions. [2021-11-20 05:35:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:35:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.75) internal successors, (150), 40 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 05:35:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:43,898 INFO L225 Difference]: With dead ends: 3663 [2021-11-20 05:35:43,898 INFO L226 Difference]: Without dead ends: 3657 [2021-11-20 05:35:43,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=629, Invalid=2127, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:35:43,899 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 768 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:43,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 576 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:35:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2021-11-20 05:35:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 2214. [2021-11-20 05:35:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2210 states have (on average 1.118552036199095) internal successors, (2472), 2213 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 2472 transitions. [2021-11-20 05:35:43,935 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 2472 transitions. Word has length 99 [2021-11-20 05:35:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:43,935 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 2472 transitions. [2021-11-20 05:35:43,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.75) internal successors, (150), 40 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 05:35:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 2472 transitions. [2021-11-20 05:35:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 05:35:43,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:43,938 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:43,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:44,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:44,159 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1738611786, now seen corresponding path program 3 times [2021-11-20 05:35:44,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:44,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822165489] [2021-11-20 05:35:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:44,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:35:44,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822165489] [2021-11-20 05:35:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822165489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:44,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263517974] [2021-11-20 05:35:44,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:35:44,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:44,386 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:44,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-20 05:35:44,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 05:35:44,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 05:35:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:44,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 05:35:44,509 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 05:35:44,946 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 05:35:44,990 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 05:35:44,990 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 05:35:46,248 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 05:35:46,248 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 05:35:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:35:46,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:48,062 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 05:35:48,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 05:35:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-20 05:35:48,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263517974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:48,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:48,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2021-11-20 05:35:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229031463] [2021-11-20 05:35:48,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:48,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 05:35:48,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 05:35:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:35:48,289 INFO L87 Difference]: Start difference. First operand 2214 states and 2472 transitions. Second operand has 39 states, 38 states have (on average 5.5) internal successors, (209), 39 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 05:35:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:49,899 INFO L93 Difference]: Finished difference Result 2758 states and 3061 transitions. [2021-11-20 05:35:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 05:35:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.5) internal successors, (209), 39 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-20 05:35:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:49,903 INFO L225 Difference]: With dead ends: 2758 [2021-11-20 05:35:49,903 INFO L226 Difference]: Without dead ends: 2758 [2021-11-20 05:35:49,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 187 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=555, Invalid=4557, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:35:49,904 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 169 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:49,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 2509 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 632 Invalid, 0 Unknown, 469 Unchecked, 0.3s Time] [2021-11-20 05:35:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2021-11-20 05:35:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 2110. [2021-11-20 05:35:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2106 states have (on average 1.1144349477682811) internal successors, (2347), 2109 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2347 transitions. [2021-11-20 05:35:49,931 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2347 transitions. Word has length 100 [2021-11-20 05:35:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:49,931 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2347 transitions. [2021-11-20 05:35:49,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.5) internal successors, (209), 39 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 05:35:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2347 transitions. [2021-11-20 05:35:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 05:35:49,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:49,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 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 05:35:49,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-20 05:35:50,147 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 602139082, now seen corresponding path program 7 times [2021-11-20 05:35:50,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047765859] [2021-11-20 05:35:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:50,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:35:50,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047765859] [2021-11-20 05:35:50,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047765859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:50,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417886051] [2021-11-20 05:35:50,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:35:50,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:50,498 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:50,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-20 05:35:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-20 05:35:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:50,620 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 10 treesize of output 8 [2021-11-20 05:35:51,104 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 05:35:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 05:35:52,688 INFO L354 Elim1Store]: treesize reduction 75, result has 9.6 percent of original size [2021-11-20 05:35:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 34 [2021-11-20 05:35:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 11 proven. 118 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 05:35:52,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:35:54,264 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse1 (select .cse0 (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 3)))) (or (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse0) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse1)) (= .cse1 0))))) is different from false [2021-11-20 05:35:54,316 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:35:54,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-11-20 05:35:54,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:35:54,325 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 173 treesize of output 167 [2021-11-20 05:35:54,435 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 05:35:54,436 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 28 treesize of output 22 [2021-11-20 05:35:54,520 INFO L354 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2021-11-20 05:35:54,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 86 [2021-11-20 05:35:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 27 proven. 51 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-20 05:35:55,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417886051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:35:55,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:35:55,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 26] total 69 [2021-11-20 05:35:55,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732758785] [2021-11-20 05:35:55,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:35:55,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 05:35:55,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:35:55,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 05:35:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4332, Unknown=1, NotChecked=132, Total=4692 [2021-11-20 05:35:55,036 INFO L87 Difference]: Start difference. First operand 2110 states and 2347 transitions. Second operand has 69 states, 69 states have (on average 3.347826086956522) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:35:58,833 INFO L93 Difference]: Finished difference Result 2166 states and 2393 transitions. [2021-11-20 05:35:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 05:35:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.347826086956522) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 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 103 [2021-11-20 05:35:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:35:58,835 INFO L225 Difference]: With dead ends: 2166 [2021-11-20 05:35:58,835 INFO L226 Difference]: Without dead ends: 2166 [2021-11-20 05:35:58,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=462, Invalid=8661, Unknown=1, NotChecked=188, Total=9312 [2021-11-20 05:35:58,836 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 202 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 1823 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1008 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:35:58,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 3041 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1823 Invalid, 0 Unknown, 1008 Unchecked, 0.7s Time] [2021-11-20 05:35:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-11-20 05:35:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2088. [2021-11-20 05:35:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2084 states have (on average 1.1108445297504799) internal successors, (2315), 2087 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2315 transitions. [2021-11-20 05:35:58,851 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2315 transitions. Word has length 103 [2021-11-20 05:35:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:35:58,852 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 2315 transitions. [2021-11-20 05:35:58,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.347826086956522) internal successors, (231), 69 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:35:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2315 transitions. [2021-11-20 05:35:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 05:35:58,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:35:58,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:35:58,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-20 05:35:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:59,064 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:35:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:35:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -87743125, now seen corresponding path program 4 times [2021-11-20 05:35:59,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:35:59,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056331124] [2021-11-20 05:35:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:35:59,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:35:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:35:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:35:59,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:35:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056331124] [2021-11-20 05:35:59,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056331124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:35:59,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926531454] [2021-11-20 05:35:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:35:59,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:35:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:35:59,443 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:35:59,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-20 05:35:59,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:35:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:35:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 05:35:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:35:59,578 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 05:35:59,583 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 05:36:00,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:36:00,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 05:36:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-20 05:36:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 05:36:01,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:05,978 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:36:05,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 213 [2021-11-20 05:36:05,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:36:05,986 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 181 treesize of output 175 [2021-11-20 05:36:06,006 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 05:36:06,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:36:06,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:36:06,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 68 [2021-11-20 05:36:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:36:09,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926531454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:09,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:09,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 58 [2021-11-20 05:36:09,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192012500] [2021-11-20 05:36:09,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:09,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 05:36:09,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 05:36:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3051, Unknown=2, NotChecked=0, Total=3306 [2021-11-20 05:36:09,890 INFO L87 Difference]: Start difference. First operand 2088 states and 2315 transitions. Second operand has 58 states, 58 states have (on average 4.241379310344827) internal successors, (246), 58 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 05:36:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:13,763 INFO L93 Difference]: Finished difference Result 2265 states and 2483 transitions. [2021-11-20 05:36:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 05:36:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.241379310344827) internal successors, (246), 58 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 104 [2021-11-20 05:36:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:13,776 INFO L225 Difference]: With dead ends: 2265 [2021-11-20 05:36:13,776 INFO L226 Difference]: Without dead ends: 2086 [2021-11-20 05:36:13,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1176, Invalid=7564, Unknown=2, NotChecked=0, Total=8742 [2021-11-20 05:36:13,777 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1021 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:13,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 2051 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1612 Invalid, 0 Unknown, 384 Unchecked, 0.9s Time] [2021-11-20 05:36:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-11-20 05:36:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1436. [2021-11-20 05:36:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1432 states have (on average 1.1215083798882681) internal successors, (1606), 1435 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1606 transitions. [2021-11-20 05:36:13,790 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1606 transitions. Word has length 104 [2021-11-20 05:36:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1606 transitions. [2021-11-20 05:36:13,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.241379310344827) internal successors, (246), 58 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 05:36:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1606 transitions. [2021-11-20 05:36:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 05:36:13,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:13,792 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:13,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-20 05:36:13,999 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1582138687, now seen corresponding path program 5 times [2021-11-20 05:36:14,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878737351] [2021-11-20 05:36:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:14,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:36:14,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878737351] [2021-11-20 05:36:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878737351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885525276] [2021-11-20 05:36:14,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:36:14,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:14,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:14,234 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:14,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-20 05:36:14,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 05:36:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:14,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 05:36:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:36:14,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:15,403 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 22 treesize of output 18 [2021-11-20 05:36:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 32 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:36:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885525276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:15,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:15,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-11-20 05:36:15,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714176940] [2021-11-20 05:36:15,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:15,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 05:36:15,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 05:36:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 05:36:15,600 INFO L87 Difference]: Start difference. First operand 1436 states and 1606 transitions. Second operand has 34 states, 33 states have (on average 6.393939393939394) internal successors, (211), 34 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:16,372 INFO L93 Difference]: Finished difference Result 1622 states and 1795 transitions. [2021-11-20 05:36:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 05:36:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 6.393939393939394) internal successors, (211), 34 states have internal predecessors, (211), 0 states have call successors, (0), 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 105 [2021-11-20 05:36:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:16,374 INFO L225 Difference]: With dead ends: 1622 [2021-11-20 05:36:16,374 INFO L226 Difference]: Without dead ends: 1622 [2021-11-20 05:36:16,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:36:16,374 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 859 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:16,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 1434 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:36:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-20 05:36:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1436. [2021-11-20 05:36:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1432 states have (on average 1.119413407821229) internal successors, (1603), 1435 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 1603 transitions. [2021-11-20 05:36:16,385 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 1603 transitions. Word has length 105 [2021-11-20 05:36:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:16,385 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 1603 transitions. [2021-11-20 05:36:16,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 6.393939393939394) internal successors, (211), 34 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 1603 transitions. [2021-11-20 05:36:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 05:36:16,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:16,387 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:16,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:16,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:16,587 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 720069073, now seen corresponding path program 4 times [2021-11-20 05:36:16,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191512045] [2021-11-20 05:36:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:16,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:36:16,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191512045] [2021-11-20 05:36:16,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191512045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484840297] [2021-11-20 05:36:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:36:16,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:16,855 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:16,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-20 05:36:16,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:36:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:16,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 05:36:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:16,989 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:36:16,990 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 05:36:16,992 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 05:36:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 37 proven. 48 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:36:17,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 37 proven. 48 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 05:36:18,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484840297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:18,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:18,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2021-11-20 05:36:18,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677622342] [2021-11-20 05:36:18,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 05:36:18,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 05:36:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 05:36:18,055 INFO L87 Difference]: Start difference. First operand 1436 states and 1603 transitions. Second operand has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:19,114 INFO L93 Difference]: Finished difference Result 2302 states and 2551 transitions. [2021-11-20 05:36:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:36:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-20 05:36:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:19,116 INFO L225 Difference]: With dead ends: 2302 [2021-11-20 05:36:19,116 INFO L226 Difference]: Without dead ends: 2114 [2021-11-20 05:36:19,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1007, Invalid=3415, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 05:36:19,117 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 769 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:19,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1695 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:36:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-11-20 05:36:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1904. [2021-11-20 05:36:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1900 states have (on average 1.1205263157894736) internal successors, (2129), 1903 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 2129 transitions. [2021-11-20 05:36:19,132 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 2129 transitions. Word has length 107 [2021-11-20 05:36:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:19,132 INFO L470 AbstractCegarLoop]: Abstraction has 1904 states and 2129 transitions. [2021-11-20 05:36:19,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.5) internal successors, (180), 40 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 2129 transitions. [2021-11-20 05:36:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-20 05:36:19,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:19,134 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 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 05:36:19,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:19,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:19,339 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:19,339 INFO L85 PathProgramCache]: Analyzing trace with hash -539389939, now seen corresponding path program 8 times [2021-11-20 05:36:19,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615355978] [2021-11-20 05:36:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:19,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:36:19,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615355978] [2021-11-20 05:36:19,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615355978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:19,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271980417] [2021-11-20 05:36:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:36:19,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:19,559 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:19,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-20 05:36:19,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:36:19,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:19,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 05:36:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:36:20,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:20,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:36:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:36:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271980417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:20,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2021-11-20 05:36:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804008461] [2021-11-20 05:36:20,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:20,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 05:36:20,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 05:36:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 05:36:20,943 INFO L87 Difference]: Start difference. First operand 1904 states and 2129 transitions. Second operand has 36 states, 35 states have (on average 5.514285714285714) internal successors, (193), 36 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:21,754 INFO L93 Difference]: Finished difference Result 2360 states and 2648 transitions. [2021-11-20 05:36:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:36:21,755 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.514285714285714) internal successors, (193), 36 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-20 05:36:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:21,756 INFO L225 Difference]: With dead ends: 2360 [2021-11-20 05:36:21,756 INFO L226 Difference]: Without dead ends: 2360 [2021-11-20 05:36:21,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 05:36:21,757 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 627 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:21,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 1151 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:36:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-11-20 05:36:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1914. [2021-11-20 05:36:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1910 states have (on average 1.1198952879581152) internal successors, (2139), 1913 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2139 transitions. [2021-11-20 05:36:21,772 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2139 transitions. Word has length 107 [2021-11-20 05:36:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:21,772 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 2139 transitions. [2021-11-20 05:36:21,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.514285714285714) internal successors, (193), 36 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2139 transitions. [2021-11-20 05:36:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 05:36:21,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:21,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:21,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:21,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-20 05:36:21,975 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1022604408, now seen corresponding path program 6 times [2021-11-20 05:36:21,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:21,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735267170] [2021-11-20 05:36:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:21,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 60 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:36:22,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735267170] [2021-11-20 05:36:22,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735267170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:22,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320384797] [2021-11-20 05:36:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:36:22,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:22,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:22,211 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-20 05:36:22,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 05:36:22,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 05:36:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:22,315 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:36:22,316 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 05:36:22,324 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 05:36:22,718 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 05:36:22,762 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 05:36:22,762 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 05:36:24,205 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 05:36:24,205 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 05:36:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:36:24,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:26,048 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 05:36:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 05:36:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 05:36:26,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320384797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:26,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:26,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 38 [2021-11-20 05:36:26,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209953119] [2021-11-20 05:36:26,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:26,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 05:36:26,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 05:36:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 05:36:26,275 INFO L87 Difference]: Start difference. First operand 1914 states and 2139 transitions. Second operand has 39 states, 38 states have (on average 5.894736842105263) internal successors, (224), 39 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:28,158 INFO L93 Difference]: Finished difference Result 2497 states and 2771 transitions. [2021-11-20 05:36:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 05:36:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.894736842105263) internal successors, (224), 39 states have internal predecessors, (224), 0 states have call successors, (0), 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 108 [2021-11-20 05:36:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:28,159 INFO L225 Difference]: With dead ends: 2497 [2021-11-20 05:36:28,160 INFO L226 Difference]: Without dead ends: 2487 [2021-11-20 05:36:28,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=597, Invalid=4805, Unknown=0, NotChecked=0, Total=5402 [2021-11-20 05:36:28,160 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 110 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:28,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1497 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 344 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2021-11-20 05:36:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-11-20 05:36:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1820. [2021-11-20 05:36:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1816 states have (on average 1.1150881057268722) internal successors, (2025), 1819 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2025 transitions. [2021-11-20 05:36:28,176 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2025 transitions. Word has length 108 [2021-11-20 05:36:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:28,177 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 2025 transitions. [2021-11-20 05:36:28,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.894736842105263) internal successors, (224), 39 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2025 transitions. [2021-11-20 05:36:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 05:36:28,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:28,178 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:28,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:28,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-20 05:36:28,379 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash -189668622, now seen corresponding path program 1 times [2021-11-20 05:36:28,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:28,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162137459] [2021-11-20 05:36:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:28,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:36:29,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162137459] [2021-11-20 05:36:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162137459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757260525] [2021-11-20 05:36:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:29,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:29,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:29,365 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:29,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-20 05:36:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:29,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 05:36:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:29,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:36:29,476 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 05:36:30,323 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 05:36:30,412 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 05:36:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 05:36:32,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:36:32,022 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 51 treesize of output 49 [2021-11-20 05:36:32,031 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:36:32,031 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 29 [2021-11-20 05:36:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:36:32,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:32,704 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 23 treesize of output 21 [2021-11-20 05:36:32,708 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 33 treesize of output 29 [2021-11-20 05:36:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:36:33,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757260525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:33,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:33,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 25] total 71 [2021-11-20 05:36:33,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850065186] [2021-11-20 05:36:33,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:33,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 05:36:33,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:33,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 05:36:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=4613, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 05:36:33,940 INFO L87 Difference]: Start difference. First operand 1820 states and 2025 transitions. Second operand has 71 states, 71 states have (on average 4.056338028169014) internal successors, (288), 71 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:38,658 INFO L93 Difference]: Finished difference Result 2595 states and 2866 transitions. [2021-11-20 05:36:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 05:36:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.056338028169014) internal successors, (288), 71 states have internal predecessors, (288), 0 states have call successors, (0), 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 109 [2021-11-20 05:36:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:38,661 INFO L225 Difference]: With dead ends: 2595 [2021-11-20 05:36:38,661 INFO L226 Difference]: Without dead ends: 2263 [2021-11-20 05:36:38,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=792, Invalid=9510, Unknown=0, NotChecked=0, Total=10302 [2021-11-20 05:36:38,662 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 448 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 4149 SdHoareTripleChecker+Invalid, 3934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1780 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:38,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 4149 Invalid, 3934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2130 Invalid, 0 Unknown, 1780 Unchecked, 1.0s Time] [2021-11-20 05:36:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-11-20 05:36:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2162. [2021-11-20 05:36:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2158 states have (on average 1.1126042632066728) internal successors, (2401), 2161 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2401 transitions. [2021-11-20 05:36:38,682 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2401 transitions. Word has length 109 [2021-11-20 05:36:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:38,682 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 2401 transitions. [2021-11-20 05:36:38,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.056338028169014) internal successors, (288), 71 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2401 transitions. [2021-11-20 05:36:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 05:36:38,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:38,684 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 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 05:36:38,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:38,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:38,885 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1337313390, now seen corresponding path program 2 times [2021-11-20 05:36:38,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911805299] [2021-11-20 05:36:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:38,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 05:36:39,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911805299] [2021-11-20 05:36:39,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911805299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363521363] [2021-11-20 05:36:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:36:39,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:39,215 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:39,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-20 05:36:39,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:36:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 05:36:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 05:36:40,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 05:36:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 05:36:41,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363521363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:41,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2021-11-20 05:36:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143056314] [2021-11-20 05:36:41,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:41,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:36:41,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:36:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:36:41,023 INFO L87 Difference]: Start difference. First operand 2162 states and 2401 transitions. Second operand has 46 states, 45 states have (on average 5.222222222222222) internal successors, (235), 46 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:36:42,716 INFO L93 Difference]: Finished difference Result 4641 states and 5112 transitions. [2021-11-20 05:36:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:36:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 5.222222222222222) internal successors, (235), 46 states have internal predecessors, (235), 0 states have call successors, (0), 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 109 [2021-11-20 05:36:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:36:42,720 INFO L225 Difference]: With dead ends: 4641 [2021-11-20 05:36:42,720 INFO L226 Difference]: Without dead ends: 4641 [2021-11-20 05:36:42,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1206, Invalid=3906, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:36:42,721 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1039 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:36:42,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 1654 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:36:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-11-20 05:36:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2312. [2021-11-20 05:36:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2308 states have (on average 1.1182842287694974) internal successors, (2581), 2311 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2581 transitions. [2021-11-20 05:36:42,779 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2581 transitions. Word has length 109 [2021-11-20 05:36:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:36:42,779 INFO L470 AbstractCegarLoop]: Abstraction has 2312 states and 2581 transitions. [2021-11-20 05:36:42,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 5.222222222222222) internal successors, (235), 46 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:36:42,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2581 transitions. [2021-11-20 05:36:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 05:36:42,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:36:42,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:36:42,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-20 05:36:42,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-20 05:36:42,983 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:36:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:36:42,983 INFO L85 PathProgramCache]: Analyzing trace with hash 189673108, now seen corresponding path program 5 times [2021-11-20 05:36:42,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:36:42,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341562131] [2021-11-20 05:36:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:36:42,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:36:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:36:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 147 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:36:44,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:36:44,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341562131] [2021-11-20 05:36:44,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341562131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:36:44,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397424245] [2021-11-20 05:36:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:36:44,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:36:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:36:44,407 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:36:44,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-20 05:36:44,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 05:36:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:36:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-20 05:36:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:36:44,618 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:36:44,618 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 05:36:45,930 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 05:36:46,039 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 05:36:46,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 05:36:53,544 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-20 05:36:53,545 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 51 treesize of output 34 [2021-11-20 05:36:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:36:53,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:36:54,425 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 23 treesize of output 21 [2021-11-20 05:36:54,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-20 05:36:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 147 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:36:56,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397424245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:36:56,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:36:56,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 28] total 86 [2021-11-20 05:36:56,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544922787] [2021-11-20 05:36:56,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:36:56,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-20 05:36:56,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:36:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-20 05:36:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=6870, Unknown=4, NotChecked=0, Total=7310 [2021-11-20 05:36:56,184 INFO L87 Difference]: Start difference. First operand 2312 states and 2581 transitions. Second operand has 86 states, 86 states have (on average 3.5232558139534884) internal successors, (303), 86 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:18,437 INFO L93 Difference]: Finished difference Result 5379 states and 5971 transitions. [2021-11-20 05:37:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-20 05:37:18,438 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.5232558139534884) internal successors, (303), 86 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-20 05:37:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:18,441 INFO L225 Difference]: With dead ends: 5379 [2021-11-20 05:37:18,441 INFO L226 Difference]: Without dead ends: 5367 [2021-11-20 05:37:18,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6371 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1344, Invalid=26367, Unknown=11, NotChecked=0, Total=27722 [2021-11-20 05:37:18,442 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1073 mSDsluCounter, 15267 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 15623 SdHoareTripleChecker+Invalid, 9130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2757 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:18,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 15623 Invalid, 9130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 6313 Invalid, 0 Unknown, 2757 Unchecked, 3.3s Time] [2021-11-20 05:37:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2021-11-20 05:37:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 2950. [2021-11-20 05:37:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2946 states have (on average 1.1215207060420909) internal successors, (3304), 2949 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3304 transitions. [2021-11-20 05:37:18,499 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3304 transitions. Word has length 111 [2021-11-20 05:37:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:18,499 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 3304 transitions. [2021-11-20 05:37:18,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.5232558139534884) internal successors, (303), 86 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3304 transitions. [2021-11-20 05:37:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 05:37:18,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:18,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:18,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-20 05:37:18,702 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:37:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2010205030, now seen corresponding path program 6 times [2021-11-20 05:37:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:18,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237687910] [2021-11-20 05:37:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:18,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:37:19,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237687910] [2021-11-20 05:37:19,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237687910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890249538] [2021-11-20 05:37:19,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:37:19,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:19,108 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:19,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-20 05:37:19,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 05:37:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 05:37:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:19,331 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:37:19,332 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 05:37:19,341 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 05:37:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-11-20 05:37:19,956 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 13 treesize of output 9 [2021-11-20 05:37:19,982 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-20 05:37:19,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2021-11-20 05:37:23,311 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 05:37:23,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-20 05:37:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:37:23,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:24,360 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| 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| |c_ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-11-20 05:37:24,363 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 05:37:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 7 proven. 70 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:37:24,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890249538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:24,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:24,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 50 [2021-11-20 05:37:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125650231] [2021-11-20 05:37:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 05:37:24,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 05:37:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2198, Unknown=1, NotChecked=94, Total=2450 [2021-11-20 05:37:24,873 INFO L87 Difference]: Start difference. First operand 2950 states and 3304 transitions. Second operand has 50 states, 50 states have (on average 3.92) internal successors, (196), 50 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:29,112 INFO L93 Difference]: Finished difference Result 3128 states and 3494 transitions. [2021-11-20 05:37:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 05:37:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 50 states have internal predecessors, (196), 0 states have call successors, (0), 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 05:37:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:29,115 INFO L225 Difference]: With dead ends: 3128 [2021-11-20 05:37:29,115 INFO L226 Difference]: Without dead ends: 3124 [2021-11-20 05:37:29,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=290, Invalid=4001, Unknown=3, NotChecked=128, Total=4422 [2021-11-20 05:37:29,115 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 420 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:29,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 2034 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 944 Invalid, 0 Unknown, 486 Unchecked, 0.4s Time] [2021-11-20 05:37:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-20 05:37:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 3004. [2021-11-20 05:37:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3000 states have (on average 1.1213333333333333) internal successors, (3364), 3003 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3364 transitions. [2021-11-20 05:37:29,140 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3364 transitions. Word has length 112 [2021-11-20 05:37:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:29,140 INFO L470 AbstractCegarLoop]: Abstraction has 3004 states and 3364 transitions. [2021-11-20 05:37:29,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 50 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3364 transitions. [2021-11-20 05:37:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:37:29,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:29,143 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 05:37:29,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:29,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-20 05:37:29,344 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:37:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1589187249, now seen corresponding path program 2 times [2021-11-20 05:37:29,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:29,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482696421] [2021-11-20 05:37:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:29,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 74 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:37:29,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482696421] [2021-11-20 05:37:29,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482696421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:29,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333491176] [2021-11-20 05:37:29,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:29,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:29,685 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:29,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-20 05:37:29,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:37:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 05:37:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:29,794 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 05:37:30,124 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 05:37:30,169 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:37:30,170 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 05:37:31,675 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:37:31,676 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 05:37:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 74 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:37:31,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:37,587 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 05:37:37,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 05:37:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 74 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:37:37,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333491176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:37,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:37,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 41 [2021-11-20 05:37:37,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98155669] [2021-11-20 05:37:37,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:37,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 05:37:37,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 05:37:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 05:37:37,884 INFO L87 Difference]: Start difference. First operand 3004 states and 3364 transitions. Second operand has 41 states, 41 states have (on average 5.317073170731708) internal successors, (218), 41 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:38,418 INFO L93 Difference]: Finished difference Result 3026 states and 3385 transitions. [2021-11-20 05:37:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 05:37:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.317073170731708) internal successors, (218), 41 states have internal predecessors, (218), 0 states have call successors, (0), 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 113 [2021-11-20 05:37:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:38,420 INFO L225 Difference]: With dead ends: 3026 [2021-11-20 05:37:38,420 INFO L226 Difference]: Without dead ends: 3004 [2021-11-20 05:37:38,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=224, Invalid=2532, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:37:38,421 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:38,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1182 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 386 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2021-11-20 05:37:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2021-11-20 05:37:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 3004. [2021-11-20 05:37:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3000 states have (on average 1.121) internal successors, (3363), 3003 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3363 transitions. [2021-11-20 05:37:38,440 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3363 transitions. Word has length 113 [2021-11-20 05:37:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:38,440 INFO L470 AbstractCegarLoop]: Abstraction has 3004 states and 3363 transitions. [2021-11-20 05:37:38,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.317073170731708) internal successors, (218), 41 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3363 transitions. [2021-11-20 05:37:38,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:37:38,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:38,442 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 05:37:38,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:38,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:38,643 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:37:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2055432527, now seen corresponding path program 3 times [2021-11-20 05:37:38,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:38,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244215881] [2021-11-20 05:37:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:38,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 11 proven. 74 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:37:39,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244215881] [2021-11-20 05:37:39,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244215881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463753453] [2021-11-20 05:37:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:37:39,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:39,004 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:39,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-20 05:37:39,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:37:39,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 05:37:39,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:39,148 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 05:37:39,154 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 05:37:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:37:39,551 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:37:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:37:40,708 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:37:40,709 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 37 treesize of output 24 [2021-11-20 05:37:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:37:40,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:42,432 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 33 treesize of output 31 [2021-11-20 05:37:42,433 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 43 treesize of output 39 [2021-11-20 05:37:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 05:37:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463753453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:37:42,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:37:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 45 [2021-11-20 05:37:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173156573] [2021-11-20 05:37:42,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:37:42,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:37:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:37:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:37:42,848 INFO L87 Difference]: Start difference. First operand 3004 states and 3363 transitions. Second operand has 45 states, 45 states have (on average 5.511111111111111) internal successors, (248), 45 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:44,452 INFO L93 Difference]: Finished difference Result 5048 states and 5636 transitions. [2021-11-20 05:37:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 05:37:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.511111111111111) internal successors, (248), 45 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-20 05:37:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:44,456 INFO L225 Difference]: With dead ends: 5048 [2021-11-20 05:37:44,456 INFO L226 Difference]: Without dead ends: 5000 [2021-11-20 05:37:44,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=477, Invalid=6003, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 05:37:44,456 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 110 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:44,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2230 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2021-11-20 05:37:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-11-20 05:37:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4324. [2021-11-20 05:37:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4324 states, 4320 states have (on average 1.1270833333333334) internal successors, (4869), 4323 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4324 states to 4324 states and 4869 transitions. [2021-11-20 05:37:44,490 INFO L78 Accepts]: Start accepts. Automaton has 4324 states and 4869 transitions. Word has length 113 [2021-11-20 05:37:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:44,491 INFO L470 AbstractCegarLoop]: Abstraction has 4324 states and 4869 transitions. [2021-11-20 05:37:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.511111111111111) internal successors, (248), 45 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4324 states and 4869 transitions. [2021-11-20 05:37:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:37:44,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:44,493 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 05:37:44,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:44,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:44,694 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:37:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:44,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1975475824, now seen corresponding path program 2 times [2021-11-20 05:37:44,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589369708] [2021-11-20 05:37:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:44,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 05:37:45,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589369708] [2021-11-20 05:37:45,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589369708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:45,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053906742] [2021-11-20 05:37:45,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:37:45,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:45,010 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:45,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-20 05:37:45,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:37:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:37:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-20 05:37:45,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:37:45,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053906742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:37:45,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:37:45,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 21 [2021-11-20 05:37:45,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412422096] [2021-11-20 05:37:45,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:37:45,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:37:45,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:37:45,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:37:45,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 05:37:45,343 INFO L87 Difference]: Start difference. First operand 4324 states and 4869 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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 05:37:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:37:45,412 INFO L93 Difference]: Finished difference Result 4328 states and 4851 transitions. [2021-11-20 05:37:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:37:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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) Word has length 113 [2021-11-20 05:37:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:37:45,416 INFO L225 Difference]: With dead ends: 4328 [2021-11-20 05:37:45,417 INFO L226 Difference]: Without dead ends: 4325 [2021-11-20 05:37:45,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:37:45,417 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:37:45,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:37:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2021-11-20 05:37:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 4257. [2021-11-20 05:37:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4257 states, 4254 states have (on average 1.1236483309826046) internal successors, (4780), 4256 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:37:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4257 states to 4257 states and 4780 transitions. [2021-11-20 05:37:45,466 INFO L78 Accepts]: Start accepts. Automaton has 4257 states and 4780 transitions. Word has length 113 [2021-11-20 05:37:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:37:45,466 INFO L470 AbstractCegarLoop]: Abstraction has 4257 states and 4780 transitions. [2021-11-20 05:37:45,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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 05:37:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4257 states and 4780 transitions. [2021-11-20 05:37:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 05:37:45,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:37:45,472 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:37:45,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-20 05:37:45,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:45,695 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:37:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:37:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1529842421, now seen corresponding path program 4 times [2021-11-20 05:37:45,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:37:45,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359539386] [2021-11-20 05:37:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:37:45,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:37:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:37:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 32 proven. 95 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:37:45,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:37:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359539386] [2021-11-20 05:37:45,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359539386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:37:45,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510257288] [2021-11-20 05:37:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:37:45,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:37:45,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:37:45,919 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:37:45,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-20 05:37:46,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:37:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:37:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-20 05:37:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:37:46,048 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:37:46,048 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 05:37:47,429 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 05:37:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:37:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 05:37:49,060 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:37:49,061 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 58 treesize of output 50 [2021-11-20 05:37:49,289 INFO L354 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2021-11-20 05:37:49,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 42 [2021-11-20 05:37:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 15 proven. 148 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:37:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:37:50,686 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 05:37:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 190 [2021-11-20 05:37:50,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:37:50,694 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 186 treesize of output 180 [2021-11-20 05:37:50,745 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 05:37:50,745 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 146 treesize of output 137 [2021-11-20 05:37:50,794 INFO L354 Elim1Store]: treesize reduction 9, result has 76.9 percent of original size [2021-11-20 05:37:50,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 105 [2021-11-20 05:38:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:38:00,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510257288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:00,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:00,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 33, 33] total 79 [2021-11-20 05:38:00,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090188049] [2021-11-20 05:38:00,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:00,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-20 05:38:00,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-20 05:38:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=5709, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 05:38:00,451 INFO L87 Difference]: Start difference. First operand 4257 states and 4780 transitions. Second operand has 79 states, 79 states have (on average 3.6835443037974684) internal successors, (291), 79 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:12,792 WARN L227 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 78 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:38:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:18,287 INFO L93 Difference]: Finished difference Result 7194 states and 8013 transitions. [2021-11-20 05:38:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-20 05:38:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.6835443037974684) internal successors, (291), 79 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-20 05:38:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:18,293 INFO L225 Difference]: With dead ends: 7194 [2021-11-20 05:38:18,293 INFO L226 Difference]: Without dead ends: 7194 [2021-11-20 05:38:18,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7596 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1757, Invalid=23365, Unknown=0, NotChecked=0, Total=25122 [2021-11-20 05:38:18,294 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 1615 mSDsluCounter, 4744 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 4871 SdHoareTripleChecker+Invalid, 4545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:18,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1615 Valid, 4871 Invalid, 4545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3411 Invalid, 0 Unknown, 933 Unchecked, 2.7s Time] [2021-11-20 05:38:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7194 states. [2021-11-20 05:38:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7194 to 6671. [2021-11-20 05:38:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6668 states have (on average 1.124625074985003) internal successors, (7499), 6670 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 7499 transitions. [2021-11-20 05:38:18,381 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 7499 transitions. Word has length 113 [2021-11-20 05:38:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 7499 transitions. [2021-11-20 05:38:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.6835443037974684) internal successors, (291), 79 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 7499 transitions. [2021-11-20 05:38:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 05:38:18,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:18,387 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 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 05:38:18,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-20 05:38:18,588 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:38:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 352683151, now seen corresponding path program 9 times [2021-11-20 05:38:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679559835] [2021-11-20 05:38:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:18,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 05:38:18,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:18,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679559835] [2021-11-20 05:38:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679559835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:18,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433045806] [2021-11-20 05:38:18,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:38:18,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:18,875 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:18,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-20 05:38:19,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 05:38:19,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 05:38:19,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:19,159 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:38:19,159 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 05:38:19,172 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 05:38:20,075 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 05:38:20,147 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 05:38:20,148 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 05:38:21,628 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-20 05:38:21,628 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 05:38:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-20 05:38:21,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:22,942 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 05:38:22,944 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 05:38:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-20 05:38:23,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433045806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:23,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:23,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 35 [2021-11-20 05:38:23,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179563197] [2021-11-20 05:38:23,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:23,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 05:38:23,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:23,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 05:38:23,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 05:38:23,691 INFO L87 Difference]: Start difference. First operand 6671 states and 7499 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:25,136 INFO L93 Difference]: Finished difference Result 8417 states and 9374 transitions. [2021-11-20 05:38:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 05:38:25,143 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 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 115 [2021-11-20 05:38:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:25,154 INFO L225 Difference]: With dead ends: 8417 [2021-11-20 05:38:25,154 INFO L226 Difference]: Without dead ends: 8318 [2021-11-20 05:38:25,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=346, Invalid=3814, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 05:38:25,156 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 45 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:25,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1295 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2021-11-20 05:38:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-11-20 05:38:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7686. [2021-11-20 05:38:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7686 states, 7683 states have (on average 1.12208772614864) internal successors, (8621), 7685 states have internal predecessors, (8621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7686 states to 7686 states and 8621 transitions. [2021-11-20 05:38:25,280 INFO L78 Accepts]: Start accepts. Automaton has 7686 states and 8621 transitions. Word has length 115 [2021-11-20 05:38:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:25,281 INFO L470 AbstractCegarLoop]: Abstraction has 7686 states and 8621 transitions. [2021-11-20 05:38:25,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7686 states and 8621 transitions. [2021-11-20 05:38:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 05:38:25,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:25,290 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:25,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:25,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:25,503 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:38:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash -293987360, now seen corresponding path program 7 times [2021-11-20 05:38:25,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:25,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657937921] [2021-11-20 05:38:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:25,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 32 proven. 89 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:38:25,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657937921] [2021-11-20 05:38:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657937921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064651612] [2021-11-20 05:38:25,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:38:25,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:25,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:25,809 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:25,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-20 05:38:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 05:38:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:25,950 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:38:25,950 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 05:38:25,953 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 05:38:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:38:27,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 05:38:28,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064651612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:28,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:28,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-11-20 05:38:28,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951191144] [2021-11-20 05:38:28,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:28,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 05:38:28,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 05:38:28,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:38:28,412 INFO L87 Difference]: Start difference. First operand 7686 states and 8621 transitions. Second operand has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:30,539 INFO L93 Difference]: Finished difference Result 8078 states and 9024 transitions. [2021-11-20 05:38:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:38:30,540 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 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 118 [2021-11-20 05:38:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:30,546 INFO L225 Difference]: With dead ends: 8078 [2021-11-20 05:38:30,546 INFO L226 Difference]: Without dead ends: 8078 [2021-11-20 05:38:30,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=964, Invalid=4148, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:38:30,547 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1359 mSDsluCounter, 2115 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:30,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1359 Valid, 2278 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:38:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-11-20 05:38:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 7699. [2021-11-20 05:38:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7696 states have (on average 1.120841995841996) internal successors, (8626), 7698 states have internal predecessors, (8626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 8626 transitions. [2021-11-20 05:38:30,664 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 8626 transitions. Word has length 118 [2021-11-20 05:38:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:30,665 INFO L470 AbstractCegarLoop]: Abstraction has 7699 states and 8626 transitions. [2021-11-20 05:38:30,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 8626 transitions. [2021-11-20 05:38:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 05:38:30,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:30,672 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:30,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:30,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:30,873 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:38:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:30,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1092248484, now seen corresponding path program 8 times [2021-11-20 05:38:30,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:30,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157223813] [2021-11-20 05:38:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:30,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 142 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:38:31,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157223813] [2021-11-20 05:38:31,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157223813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:31,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115122964] [2021-11-20 05:38:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:31,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:31,607 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-20 05:38:31,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:31,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-20 05:38:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:31,811 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:38:31,811 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 05:38:33,024 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 30 treesize of output 26 [2021-11-20 05:38:33,137 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-11-20 05:38:33,138 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 41 treesize of output 40 [2021-11-20 05:38:39,884 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 05:38:39,885 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 28 [2021-11-20 05:38:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 9 proven. 137 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:38:40,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:42,196 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 75 treesize of output 69 [2021-11-20 05:38:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:38:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115122964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:44,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:44,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 71 [2021-11-20 05:38:44,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328380946] [2021-11-20 05:38:44,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:44,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 05:38:44,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 05:38:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4711, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 05:38:44,537 INFO L87 Difference]: Start difference. First operand 7699 states and 8626 transitions. Second operand has 71 states, 71 states have (on average 4.070422535211268) internal successors, (289), 71 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:07,765 INFO L93 Difference]: Finished difference Result 11610 states and 12955 transitions. [2021-11-20 05:39:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-20 05:39:07,766 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.070422535211268) internal successors, (289), 71 states have internal predecessors, (289), 0 states have call successors, (0), 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 119 [2021-11-20 05:39:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:07,773 INFO L225 Difference]: With dead ends: 11610 [2021-11-20 05:39:07,774 INFO L226 Difference]: Without dead ends: 11546 [2021-11-20 05:39:07,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8484 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=2278, Invalid=31028, Unknown=0, NotChecked=0, Total=33306 [2021-11-20 05:39:07,775 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 2618 mSDsluCounter, 7629 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 7836 SdHoareTripleChecker+Invalid, 8766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1655 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:07,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 7836 Invalid, 8766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 6761 Invalid, 0 Unknown, 1655 Unchecked, 4.3s Time] [2021-11-20 05:39:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11546 states. [2021-11-20 05:39:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11546 to 8589. [2021-11-20 05:39:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8589 states, 8586 states have (on average 1.1203121360354065) internal successors, (9619), 8588 states have internal predecessors, (9619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8589 states to 8589 states and 9619 transitions. [2021-11-20 05:39:07,919 INFO L78 Accepts]: Start accepts. Automaton has 8589 states and 9619 transitions. Word has length 119 [2021-11-20 05:39:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 8589 states and 9619 transitions. [2021-11-20 05:39:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.070422535211268) internal successors, (289), 71 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8589 states and 9619 transitions. [2021-11-20 05:39:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 05:39:07,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:07,928 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:07,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:08,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:08,128 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1964054620, now seen corresponding path program 9 times [2021-11-20 05:39:08,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:08,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630394550] [2021-11-20 05:39:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:08,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 142 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:08,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630394550] [2021-11-20 05:39:08,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630394550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:08,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883826839] [2021-11-20 05:39:08,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:39:08,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:08,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:08,823 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:08,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-20 05:39:08,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:39:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 05:39:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:08,999 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:39:08,999 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 05:39:09,584 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 23 treesize of output 19 [2021-11-20 05:39:09,643 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-20 05:39:09,644 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 05:39:10,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:39:10,060 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 21 treesize of output 21 [2021-11-20 05:39:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-20 05:39:10,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:11,734 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 71 treesize of output 65 [2021-11-20 05:39:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-20 05:39:14,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883826839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:14,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:14,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 46 [2021-11-20 05:39:14,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982688472] [2021-11-20 05:39:14,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:14,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 05:39:14,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 05:39:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 05:39:14,233 INFO L87 Difference]: Start difference. First operand 8589 states and 9619 transitions. Second operand has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:24,523 INFO L93 Difference]: Finished difference Result 12788 states and 14188 transitions. [2021-11-20 05:39:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-11-20 05:39:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 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 119 [2021-11-20 05:39:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:24,531 INFO L225 Difference]: With dead ends: 12788 [2021-11-20 05:39:24,531 INFO L226 Difference]: Without dead ends: 12405 [2021-11-20 05:39:24,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12283 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=3411, Invalid=36789, Unknown=0, NotChecked=0, Total=40200 [2021-11-20 05:39:24,533 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 807 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 4390 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 4644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:24,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2545 Invalid, 4644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4390 Invalid, 0 Unknown, 148 Unchecked, 2.1s Time] [2021-11-20 05:39:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12405 states. [2021-11-20 05:39:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12405 to 9517. [2021-11-20 05:39:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9517 states, 9514 states have (on average 1.1198234181206643) internal successors, (10654), 9516 states have internal predecessors, (10654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 10654 transitions. [2021-11-20 05:39:24,627 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 10654 transitions. Word has length 119 [2021-11-20 05:39:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:24,628 INFO L470 AbstractCegarLoop]: Abstraction has 9517 states and 10654 transitions. [2021-11-20 05:39:24,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.608695652173913) internal successors, (212), 46 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 10654 transitions. [2021-11-20 05:39:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 05:39:24,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:24,631 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:24,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:24,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-20 05:39:24,832 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 190002129, now seen corresponding path program 5 times [2021-11-20 05:39:24,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829878768] [2021-11-20 05:39:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:24,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 50 proven. 129 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:25,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829878768] [2021-11-20 05:39:25,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829878768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:25,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340738857] [2021-11-20 05:39:25,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:39:25,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:25,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:25,136 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:25,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-20 05:39:25,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 05:39:25,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 05:39:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:26,689 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 22 treesize of output 18 [2021-11-20 05:39:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:26,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340738857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:26,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:26,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2021-11-20 05:39:26,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642750677] [2021-11-20 05:39:26,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 05:39:26,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 05:39:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 05:39:26,994 INFO L87 Difference]: Start difference. First operand 9517 states and 10654 transitions. Second operand has 44 states, 43 states have (on average 5.883720930232558) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:28,093 INFO L93 Difference]: Finished difference Result 10531 states and 11770 transitions. [2021-11-20 05:39:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:39:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.883720930232558) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 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 05:39:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:28,100 INFO L225 Difference]: With dead ends: 10531 [2021-11-20 05:39:28,100 INFO L226 Difference]: Without dead ends: 10531 [2021-11-20 05:39:28,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=862, Invalid=3044, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 05:39:28,101 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 1452 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 2461 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:28,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 2461 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:39:28,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10531 states. [2021-11-20 05:39:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10531 to 9925. [2021-11-20 05:39:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9922 states have (on average 1.1205402136665994) internal successors, (11118), 9924 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 11118 transitions. [2021-11-20 05:39:28,213 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 11118 transitions. Word has length 122 [2021-11-20 05:39:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:28,213 INFO L470 AbstractCegarLoop]: Abstraction has 9925 states and 11118 transitions. [2021-11-20 05:39:28,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.883720930232558) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 11118 transitions. [2021-11-20 05:39:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 05:39:28,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:28,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:28,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:28,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-20 05:39:28,418 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1559559851, now seen corresponding path program 2 times [2021-11-20 05:39:28,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:28,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49275611] [2021-11-20 05:39:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:28,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:39:28,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49275611] [2021-11-20 05:39:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49275611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532704093] [2021-11-20 05:39:28,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:39:28,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:28,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:28,850 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:28,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-20 05:39:28,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:39:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:28,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 05:39:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:29,002 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 05:39:29,426 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 05:39:29,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 05:39:30,905 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 05:39:30,905 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 05:39:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:39:30,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:31,792 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| 4)) 0)) is different from false [2021-11-20 05:39:31,796 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 05:39:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:39:32,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532704093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:32,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:32,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 48 [2021-11-20 05:39:32,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218785620] [2021-11-20 05:39:32,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 05:39:32,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 05:39:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2022, Unknown=1, NotChecked=90, Total=2256 [2021-11-20 05:39:32,173 INFO L87 Difference]: Start difference. First operand 9925 states and 11118 transitions. Second operand has 48 states, 48 states have (on average 4.6875) internal successors, (225), 48 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:38,201 INFO L93 Difference]: Finished difference Result 10062 states and 11254 transitions. [2021-11-20 05:39:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 05:39:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.6875) internal successors, (225), 48 states have internal predecessors, (225), 0 states have call successors, (0), 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 125 [2021-11-20 05:39:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:38,208 INFO L225 Difference]: With dead ends: 10062 [2021-11-20 05:39:38,208 INFO L226 Difference]: Without dead ends: 10058 [2021-11-20 05:39:38,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=242, Invalid=3301, Unknown=1, NotChecked=116, Total=3660 [2021-11-20 05:39:38,209 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 221 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:38,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 3266 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 684 Invalid, 0 Unknown, 830 Unchecked, 0.3s Time] [2021-11-20 05:39:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-11-20 05:39:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 9914. [2021-11-20 05:39:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9914 states, 9911 states have (on average 1.1200686106346485) internal successors, (11101), 9913 states have internal predecessors, (11101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9914 states to 9914 states and 11101 transitions. [2021-11-20 05:39:38,287 INFO L78 Accepts]: Start accepts. Automaton has 9914 states and 11101 transitions. Word has length 125 [2021-11-20 05:39:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:38,287 INFO L470 AbstractCegarLoop]: Abstraction has 9914 states and 11101 transitions. [2021-11-20 05:39:38,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.6875) internal successors, (225), 48 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 9914 states and 11101 transitions. [2021-11-20 05:39:38,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 05:39:38,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:38,292 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 05:39:38,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:38,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:38,493 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:38,494 INFO L85 PathProgramCache]: Analyzing trace with hash 82371518, now seen corresponding path program 6 times [2021-11-20 05:39:38,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:38,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099412733] [2021-11-20 05:39:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:38,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 11 proven. 105 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:38,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099412733] [2021-11-20 05:39:38,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099412733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855187060] [2021-11-20 05:39:38,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:39:38,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:38,875 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:38,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-20 05:39:39,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 05:39:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:39,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-20 05:39:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:39,276 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 14 treesize of output 10 [2021-11-20 05:39:40,834 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-20 05:39:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 31 [2021-11-20 05:39:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 05:39:40,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 05:39:41,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855187060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:41,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:41,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 19] total 56 [2021-11-20 05:39:41,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771420081] [2021-11-20 05:39:41,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:41,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 05:39:41,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:41,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 05:39:41,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2907, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 05:39:41,873 INFO L87 Difference]: Start difference. First operand 9914 states and 11101 transitions. Second operand has 56 states, 56 states have (on average 4.839285714285714) internal successors, (271), 56 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:43,649 INFO L93 Difference]: Finished difference Result 14307 states and 15875 transitions. [2021-11-20 05:39:43,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-20 05:39:43,649 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.839285714285714) internal successors, (271), 56 states have internal predecessors, (271), 0 states have call successors, (0), 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 05:39:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:43,663 INFO L225 Difference]: With dead ends: 14307 [2021-11-20 05:39:43,664 INFO L226 Difference]: Without dead ends: 14101 [2021-11-20 05:39:43,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=445, Invalid=8675, Unknown=0, NotChecked=0, Total=9120 [2021-11-20 05:39:43,665 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 297 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:43,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1870 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 819 Invalid, 0 Unknown, 340 Unchecked, 0.3s Time] [2021-11-20 05:39:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14101 states. [2021-11-20 05:39:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14101 to 12210. [2021-11-20 05:39:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12210 states, 12207 states have (on average 1.1178831817809454) internal successors, (13646), 12209 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12210 states to 12210 states and 13646 transitions. [2021-11-20 05:39:43,781 INFO L78 Accepts]: Start accepts. Automaton has 12210 states and 13646 transitions. Word has length 126 [2021-11-20 05:39:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:43,782 INFO L470 AbstractCegarLoop]: Abstraction has 12210 states and 13646 transitions. [2021-11-20 05:39:43,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.839285714285714) internal successors, (271), 56 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12210 states and 13646 transitions. [2021-11-20 05:39:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 05:39:43,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:43,787 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:43,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:43,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:43,989 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -361718912, now seen corresponding path program 3 times [2021-11-20 05:39:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855514242] [2021-11-20 05:39:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:43,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 88 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 05:39:44,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855514242] [2021-11-20 05:39:44,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855514242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502566353] [2021-11-20 05:39:44,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:39:44,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:44,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:44,208 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:44,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-20 05:39:44,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 05:39:44,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 05:39:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:44,326 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:39:44,326 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 05:39:44,334 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 05:39:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:39:44,788 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-20 05:39:44,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-20 05:39:45,686 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 05:39:45,686 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 37 treesize of output 24 [2021-11-20 05:39:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-20 05:39:45,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:46,902 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 05:39:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 05:39:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-20 05:39:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502566353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:47,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:47,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 29 [2021-11-20 05:39:47,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506539186] [2021-11-20 05:39:47,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 05:39:47,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 05:39:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-11-20 05:39:47,157 INFO L87 Difference]: Start difference. First operand 12210 states and 13646 transitions. Second operand has 30 states, 29 states have (on average 7.517241379310345) internal successors, (218), 30 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:48,755 INFO L93 Difference]: Finished difference Result 12253 states and 13491 transitions. [2021-11-20 05:39:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:39:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 7.517241379310345) internal successors, (218), 30 states have internal predecessors, (218), 0 states have call successors, (0), 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 05:39:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:48,765 INFO L225 Difference]: With dead ends: 12253 [2021-11-20 05:39:48,765 INFO L226 Difference]: Without dead ends: 12107 [2021-11-20 05:39:48,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 05:39:48,766 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 69 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:48,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 720 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 236 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-11-20 05:39:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12107 states. [2021-11-20 05:39:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12107 to 10558. [2021-11-20 05:39:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10558 states, 10556 states have (on average 1.1018378173550587) internal successors, (11631), 10557 states have internal predecessors, (11631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10558 states to 10558 states and 11631 transitions. [2021-11-20 05:39:48,884 INFO L78 Accepts]: Start accepts. Automaton has 10558 states and 11631 transitions. Word has length 126 [2021-11-20 05:39:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:48,884 INFO L470 AbstractCegarLoop]: Abstraction has 10558 states and 11631 transitions. [2021-11-20 05:39:48,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 7.517241379310345) internal successors, (218), 30 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 10558 states and 11631 transitions. [2021-11-20 05:39:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 05:39:48,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:48,891 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:48,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:49,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:49,092 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1085514664, now seen corresponding path program 7 times [2021-11-20 05:39:49,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047460448] [2021-11-20 05:39:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:49,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 99 proven. 25 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-20 05:39:49,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:49,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047460448] [2021-11-20 05:39:49,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047460448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:49,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674586941] [2021-11-20 05:39:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:39:49,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:49,375 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:49,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-20 05:39:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:49,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 05:39:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 107 proven. 14 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:39:49,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:50,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:39:50,165 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 19 treesize of output 23 [2021-11-20 05:39:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 113 proven. 8 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-20 05:39:50,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674586941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:50,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:50,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2021-11-20 05:39:50,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372021256] [2021-11-20 05:39:50,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:39:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:39:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:39:50,546 INFO L87 Difference]: Start difference. First operand 10558 states and 11631 transitions. Second operand has 31 states, 30 states have (on average 6.366666666666666) internal successors, (191), 31 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 05:39:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:52,039 INFO L93 Difference]: Finished difference Result 11230 states and 12303 transitions. [2021-11-20 05:39:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 05:39:52,040 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.366666666666666) internal successors, (191), 31 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-20 05:39:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:52,047 INFO L225 Difference]: With dead ends: 11230 [2021-11-20 05:39:52,047 INFO L226 Difference]: Without dead ends: 8890 [2021-11-20 05:39:52,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1351, Invalid=3761, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 05:39:52,051 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 332 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:52,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1405 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:39:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8890 states. [2021-11-20 05:39:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8890 to 7509. [2021-11-20 05:39:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7509 states, 7507 states have (on average 1.101904888770481) internal successors, (8272), 7508 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7509 states to 7509 states and 8272 transitions. [2021-11-20 05:39:52,191 INFO L78 Accepts]: Start accepts. Automaton has 7509 states and 8272 transitions. Word has length 127 [2021-11-20 05:39:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:52,192 INFO L470 AbstractCegarLoop]: Abstraction has 7509 states and 8272 transitions. [2021-11-20 05:39:52,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.366666666666666) internal successors, (191), 31 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 05:39:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7509 states and 8272 transitions. [2021-11-20 05:39:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 05:39:52,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:52,198 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 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 05:39:52,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:52,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:52,411 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1196324126, now seen corresponding path program 3 times [2021-11-20 05:39:52,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:52,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347604781] [2021-11-20 05:39:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:52,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-20 05:39:52,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347604781] [2021-11-20 05:39:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347604781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:52,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532679094] [2021-11-20 05:39:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:39:52,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:52,693 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:52,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-20 05:39:52,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:39:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 05:39:52,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:39:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 35 proven. 100 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 05:39:53,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:39:54,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:39:54,224 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 15 treesize of output 19 [2021-11-20 05:39:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 35 proven. 100 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-20 05:39:54,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532679094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:39:54,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:39:54,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2021-11-20 05:39:54,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538928871] [2021-11-20 05:39:54,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:39:54,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 05:39:54,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:39:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 05:39:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:39:54,701 INFO L87 Difference]: Start difference. First operand 7509 states and 8272 transitions. Second operand has 50 states, 50 states have (on average 4.74) internal successors, (237), 50 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 05:39:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:58,086 INFO L93 Difference]: Finished difference Result 16879 states and 18474 transitions. [2021-11-20 05:39:58,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 05:39:58,087 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.74) internal successors, (237), 50 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) Word has length 128 [2021-11-20 05:39:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:58,146 INFO L225 Difference]: With dead ends: 16879 [2021-11-20 05:39:58,146 INFO L226 Difference]: Without dead ends: 16873 [2021-11-20 05:39:58,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1663, Invalid=9049, Unknown=0, NotChecked=0, Total=10712 [2021-11-20 05:39:58,149 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2251 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:58,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 1879 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:39:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16873 states. [2021-11-20 05:39:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16873 to 9936. [2021-11-20 05:39:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9934 states have (on average 1.1037849808737668) internal successors, (10965), 9935 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:39:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 10965 transitions. [2021-11-20 05:39:58,290 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 10965 transitions. Word has length 128 [2021-11-20 05:39:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 9936 states and 10965 transitions. [2021-11-20 05:39:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.74) internal successors, (237), 50 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 05:39:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 10965 transitions. [2021-11-20 05:39:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 05:39:58,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:58,296 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:58,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:58,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-11-20 05:39:58,497 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:39:58,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:58,498 INFO L85 PathProgramCache]: Analyzing trace with hash -374499245, now seen corresponding path program 8 times [2021-11-20 05:39:58,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:58,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185758332] [2021-11-20 05:39:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:58,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:39:59,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185758332] [2021-11-20 05:39:59,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185758332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589988503] [2021-11-20 05:39:59,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:39:59,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:59,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:59,139 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:59,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-20 05:39:59,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:39:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:39:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-20 05:39:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:00,228 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 05:40:00,306 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 05:40:00,307 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 05:40:03,773 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-20 05:40:03,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 38 [2021-11-20 05:40:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 17 proven. 164 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 05:40:03,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:10,882 INFO L354 Elim1Store]: treesize reduction 113, result has 31.5 percent of original size [2021-11-20 05:40:10,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 607 treesize of output 554 [2021-11-20 05:40:10,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:40:10,899 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 380 treesize of output 372 [2021-11-20 05:40:10,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2021-11-20 05:40:10,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:10,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:40:10,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-11-20 05:40:31,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:31,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:31,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:40:31,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:40:31,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 227 [2021-11-20 05:40:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 05:40:33,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589988503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:33,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:33,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 33] total 77 [2021-11-20 05:40:33,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799646088] [2021-11-20 05:40:33,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:33,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 05:40:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 05:40:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=5517, Unknown=6, NotChecked=0, Total=5852 [2021-11-20 05:40:33,439 INFO L87 Difference]: Start difference. First operand 9936 states and 10965 transitions. Second operand has 77 states, 77 states have (on average 4.090909090909091) internal successors, (315), 77 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:40:34,595 INFO L93 Difference]: Finished difference Result 10352 states and 11420 transitions. [2021-11-20 05:40:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 05:40:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 4.090909090909091) internal successors, (315), 77 states have internal predecessors, (315), 0 states have call successors, (0), 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 131 [2021-11-20 05:40:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:40:34,602 INFO L225 Difference]: With dead ends: 10352 [2021-11-20 05:40:34,602 INFO L226 Difference]: Without dead ends: 10304 [2021-11-20 05:40:34,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=468, Invalid=8268, Unknown=6, NotChecked=0, Total=8742 [2021-11-20 05:40:34,603 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 213 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3563 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:40:34,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3563 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 971 Invalid, 0 Unknown, 455 Unchecked, 0.4s Time] [2021-11-20 05:40:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-11-20 05:40:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10210. [2021-11-20 05:40:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10208 states have (on average 1.10423197492163) internal successors, (11272), 10209 states have internal predecessors, (11272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 11272 transitions. [2021-11-20 05:40:34,756 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 11272 transitions. Word has length 131 [2021-11-20 05:40:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:40:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 10210 states and 11272 transitions. [2021-11-20 05:40:34,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 4.090909090909091) internal successors, (315), 77 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 11272 transitions. [2021-11-20 05:40:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 05:40:34,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:40:34,762 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:40:34,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-20 05:40:34,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:34,963 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:40:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:40:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1043668051, now seen corresponding path program 9 times [2021-11-20 05:40:34,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:40:34,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279891410] [2021-11-20 05:40:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:34,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:40:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:40:35,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:40:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279891410] [2021-11-20 05:40:35,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279891410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:40:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542076812] [2021-11-20 05:40:35,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:40:35,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:40:35,515 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:40:35,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-20 05:40:35,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:40:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:40:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 05:40:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:35,712 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 05:40:35,718 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 05:40:36,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 05:40:36,440 INFO L354 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2021-11-20 05:40:36,440 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 05:40:37,194 INFO L354 Elim1Store]: treesize reduction 43, result has 18.9 percent of original size [2021-11-20 05:40:37,195 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 24 [2021-11-20 05:40:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-20 05:40:37,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:38,788 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 63 treesize of output 59 [2021-11-20 05:40:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-20 05:40:41,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542076812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:41,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:41,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 13] total 45 [2021-11-20 05:40:41,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140877832] [2021-11-20 05:40:41,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:41,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 05:40:41,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 05:40:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:40:41,299 INFO L87 Difference]: Start difference. First operand 10210 states and 11272 transitions. Second operand has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:40:43,953 INFO L93 Difference]: Finished difference Result 10854 states and 11935 transitions. [2021-11-20 05:40:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 05:40:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 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 131 [2021-11-20 05:40:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:40:43,961 INFO L225 Difference]: With dead ends: 10854 [2021-11-20 05:40:43,962 INFO L226 Difference]: Without dead ends: 7168 [2021-11-20 05:40:43,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=672, Invalid=8258, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 05:40:43,963 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 137 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:40:43,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1406 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 593 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-11-20 05:40:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-20 05:40:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3920. [2021-11-20 05:40:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 1.1079356978821129) internal successors, (4342), 3919 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4342 transitions. [2021-11-20 05:40:44,048 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4342 transitions. Word has length 131 [2021-11-20 05:40:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:40:44,048 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 4342 transitions. [2021-11-20 05:40:44,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.066666666666666) internal successors, (228), 45 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4342 transitions. [2021-11-20 05:40:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 05:40:44,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:40:44,051 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 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 05:40:44,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-20 05:40:44,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:44,252 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:40:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:40:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1146964543, now seen corresponding path program 4 times [2021-11-20 05:40:44,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:40:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269438847] [2021-11-20 05:40:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:44,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:40:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 138 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 05:40:44,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:40:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269438847] [2021-11-20 05:40:44,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269438847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:40:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774403477] [2021-11-20 05:40:44,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:40:44,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:40:44,632 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:40:44,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-20 05:40:44,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:40:44,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:40:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 05:40:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:44,785 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:40:44,785 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 05:40:44,788 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 05:40:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 138 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 05:40:45,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 138 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 05:40:46,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774403477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:46,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:46,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2021-11-20 05:40:46,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447745345] [2021-11-20 05:40:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:46,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 05:40:46,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 05:40:46,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1983, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 05:40:46,614 INFO L87 Difference]: Start difference. First operand 3920 states and 4342 transitions. Second operand has 49 states, 49 states have (on average 5.408163265306122) internal successors, (265), 49 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:40:47,959 INFO L93 Difference]: Finished difference Result 6860 states and 7437 transitions. [2021-11-20 05:40:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:40:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.408163265306122) internal successors, (265), 49 states have internal predecessors, (265), 0 states have call successors, (0), 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 05:40:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:40:47,963 INFO L225 Difference]: With dead ends: 6860 [2021-11-20 05:40:47,964 INFO L226 Difference]: Without dead ends: 3803 [2021-11-20 05:40:47,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1044, Invalid=4212, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 05:40:47,964 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 651 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:40:47,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1677 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:40:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3803 states. [2021-11-20 05:40:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3803 to 2459. [2021-11-20 05:40:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 1.1037428803905613) internal successors, (2713), 2458 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 2713 transitions. [2021-11-20 05:40:48,005 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 2713 transitions. Word has length 140 [2021-11-20 05:40:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:40:48,005 INFO L470 AbstractCegarLoop]: Abstraction has 2459 states and 2713 transitions. [2021-11-20 05:40:48,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.408163265306122) internal successors, (265), 49 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 2713 transitions. [2021-11-20 05:40:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-20 05:40:48,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:40:48,007 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:40:48,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-20 05:40:48,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:48,208 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:40:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:40:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1175746349, now seen corresponding path program 1 times [2021-11-20 05:40:48,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:40:48,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38821429] [2021-11-20 05:40:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:48,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:40:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 101 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:40:48,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:40:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38821429] [2021-11-20 05:40:48,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38821429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:40:48,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332106326] [2021-11-20 05:40:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:48,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:48,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:40:48,643 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:40:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-20 05:40:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 05:40:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:48,812 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:40:48,813 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 05:40:48,815 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 05:40:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 103 proven. 89 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:40:49,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 102 proven. 90 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 05:40:50,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332106326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:40:50,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:40:50,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 51 [2021-11-20 05:40:50,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444307273] [2021-11-20 05:40:50,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:40:50,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:40:50,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:40:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:40:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2166, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:40:50,757 INFO L87 Difference]: Start difference. First operand 2459 states and 2713 transitions. Second operand has 51 states, 51 states have (on average 5.96078431372549) internal successors, (304), 51 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:40:52,933 INFO L93 Difference]: Finished difference Result 3592 states and 3886 transitions. [2021-11-20 05:40:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 05:40:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.96078431372549) internal successors, (304), 51 states have internal predecessors, (304), 0 states have call successors, (0), 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 147 [2021-11-20 05:40:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:40:52,935 INFO L225 Difference]: With dead ends: 3592 [2021-11-20 05:40:52,935 INFO L226 Difference]: Without dead ends: 420 [2021-11-20 05:40:52,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1941, Invalid=6989, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 05:40:52,936 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 689 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 2100 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:40:52,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 2100 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:40:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-20 05:40:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-11-20 05:40:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.0930787589498807) internal successors, (458), 419 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 458 transitions. [2021-11-20 05:40:52,940 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 458 transitions. Word has length 147 [2021-11-20 05:40:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:40:52,940 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 458 transitions. [2021-11-20 05:40:52,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.96078431372549) internal successors, (304), 51 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:40:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 458 transitions. [2021-11-20 05:40:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 05:40:52,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:40:52,942 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 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 05:40:52,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-20 05:40:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:53,159 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:40:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:40:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1730152168, now seen corresponding path program 5 times [2021-11-20 05:40:53,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:40:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39819691] [2021-11-20 05:40:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:40:53,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:40:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:40:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 55 proven. 120 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-11-20 05:40:53,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:40:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39819691] [2021-11-20 05:40:53,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39819691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:40:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84826906] [2021-11-20 05:40:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:40:53,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:40:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:40:53,449 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:40:53,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-20 05:40:54,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-20 05:40:54,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:40:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-20 05:40:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:40:54,868 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 05:40:57,424 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-20 05:40:57,424 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 40 treesize of output 25 [2021-11-20 05:40:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 28 proven. 223 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 05:40:57,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:40:59,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:40:59,562 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 05:40:59,578 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 05:40:59,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:40:59,614 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 05:41:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 28 proven. 201 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-20 05:41:02,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84826906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:02,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:02,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 34, 32] total 77 [2021-11-20 05:41:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117888906] [2021-11-20 05:41:02,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 05:41:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 05:41:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 05:41:02,356 INFO L87 Difference]: Start difference. First operand 420 states and 458 transitions. Second operand has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:09,172 INFO L93 Difference]: Finished difference Result 1534 states and 1678 transitions. [2021-11-20 05:41:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-20 05:41:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 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 152 [2021-11-20 05:41:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:09,173 INFO L225 Difference]: With dead ends: 1534 [2021-11-20 05:41:09,174 INFO L226 Difference]: Without dead ends: 1308 [2021-11-20 05:41:09,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4490 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=714, Invalid=21936, Unknown=0, NotChecked=0, Total=22650 [2021-11-20 05:41:09,175 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 795 mSDsluCounter, 9779 mSDsCounter, 0 mSdLazyCounter, 3562 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 9993 SdHoareTripleChecker+Invalid, 6718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3102 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:09,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 9993 Invalid, 6718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3562 Invalid, 0 Unknown, 3102 Unchecked, 2.0s Time] [2021-11-20 05:41:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-20 05:41:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 526. [2021-11-20 05:41:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.099047619047619) internal successors, (577), 525 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 577 transitions. [2021-11-20 05:41:09,183 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 577 transitions. Word has length 152 [2021-11-20 05:41:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:09,183 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 577 transitions. [2021-11-20 05:41:09,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 577 transitions. [2021-11-20 05:41:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 05:41:09,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:09,184 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:09,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:09,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:09,388 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 157813465, now seen corresponding path program 2 times [2021-11-20 05:41:09,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:09,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149057073] [2021-11-20 05:41:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:09,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 51 proven. 91 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 05:41:09,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149057073] [2021-11-20 05:41:09,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149057073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:09,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667831643] [2021-11-20 05:41:09,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:41:09,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:09,647 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:09,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-20 05:41:09,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:41:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-20 05:41:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:10,281 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 05:41:11,799 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 05:41:11,800 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 05:41:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 05:41:11,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:14,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString1~0#1.offset| Int) (|v_ULTIMATE.start_cstrstr_#t~post17#1.base_490| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_cstrstr_#t~post17#1.base_490|) (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| 6)))) (or (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 5)) .cse0)) (= .cse0 0)))) is different from false [2021-11-20 05:41:14,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:41:14,392 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 05:41:14,444 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 05:41:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 166 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-20 05:41:14,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667831643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:14,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:14,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 29, 29] total 61 [2021-11-20 05:41:14,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472607406] [2021-11-20 05:41:14,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:14,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 05:41:14,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 05:41:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3394, Unknown=1, NotChecked=116, Total=3660 [2021-11-20 05:41:14,782 INFO L87 Difference]: Start difference. First operand 526 states and 577 transitions. Second operand has 61 states, 61 states have (on average 4.901639344262295) internal successors, (299), 61 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:18,015 INFO L93 Difference]: Finished difference Result 746 states and 817 transitions. [2021-11-20 05:41:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 05:41:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.901639344262295) internal successors, (299), 61 states have internal predecessors, (299), 0 states have call successors, (0), 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 155 [2021-11-20 05:41:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:18,017 INFO L225 Difference]: With dead ends: 746 [2021-11-20 05:41:18,017 INFO L226 Difference]: Without dead ends: 730 [2021-11-20 05:41:18,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 280 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=306, Invalid=6669, Unknown=1, NotChecked=164, Total=7140 [2021-11-20 05:41:18,018 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 89 mSDsluCounter, 2487 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:18,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 2540 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1593 Invalid, 0 Unknown, 572 Unchecked, 0.8s Time] [2021-11-20 05:41:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-20 05:41:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 568. [2021-11-20 05:41:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.0987654320987654) internal successors, (623), 567 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 623 transitions. [2021-11-20 05:41:18,025 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 623 transitions. Word has length 155 [2021-11-20 05:41:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:18,025 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 623 transitions. [2021-11-20 05:41:18,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.901639344262295) internal successors, (299), 61 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 623 transitions. [2021-11-20 05:41:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-20 05:41:18,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:18,026 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 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 05:41:18,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:18,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-20 05:41:18,227 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash -174281789, now seen corresponding path program 6 times [2021-11-20 05:41:18,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:18,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868092937] [2021-11-20 05:41:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:18,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 66 proven. 192 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:18,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:18,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868092937] [2021-11-20 05:41:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868092937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972917833] [2021-11-20 05:41:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:41:18,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:18,693 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:18,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-20 05:41:19,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 05:41:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:19,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 05:41:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 98 proven. 160 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:20,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:21,512 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 05:41:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 98 proven. 160 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:21,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972917833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:21,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:21,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2021-11-20 05:41:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142723814] [2021-11-20 05:41:21,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:21,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 05:41:21,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 05:41:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2426, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 05:41:21,642 INFO L87 Difference]: Start difference. First operand 568 states and 623 transitions. Second operand has 53 states, 52 states have (on average 5.788461538461538) internal successors, (301), 53 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:23,537 INFO L93 Difference]: Finished difference Result 1444 states and 1580 transitions. [2021-11-20 05:41:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 05:41:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 5.788461538461538) internal successors, (301), 53 states have internal predecessors, (301), 0 states have call successors, (0), 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 159 [2021-11-20 05:41:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:23,539 INFO L225 Difference]: With dead ends: 1444 [2021-11-20 05:41:23,539 INFO L226 Difference]: Without dead ends: 1444 [2021-11-20 05:41:23,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 05:41:23,540 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 792 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:23,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2379 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 05:41:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-20 05:41:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 806. [2021-11-20 05:41:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.101863354037267) internal successors, (887), 805 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 887 transitions. [2021-11-20 05:41:23,549 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 887 transitions. Word has length 159 [2021-11-20 05:41:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:23,550 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 887 transitions. [2021-11-20 05:41:23,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 5.788461538461538) internal successors, (301), 53 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 887 transitions. [2021-11-20 05:41:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 05:41:23,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:23,551 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:23,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:23,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-20 05:41:23,754 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash -538047141, now seen corresponding path program 3 times [2021-11-20 05:41:23,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:23,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8503004] [2021-11-20 05:41:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:23,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 62 proven. 127 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-20 05:41:24,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8503004] [2021-11-20 05:41:24,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8503004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:24,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104962198] [2021-11-20 05:41:24,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:41:24,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:24,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:24,087 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:24,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-20 05:41:24,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:41:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:24,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-20 05:41:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:24,788 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:41:24,788 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 05:41:25,143 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 05:41:27,261 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-11-20 05:41:27,261 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 51 treesize of output 60 [2021-11-20 05:41:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 166 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-20 05:41:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:33,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:41:33,139 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 05:41:33,166 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 05:41:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 26 proven. 162 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-20 05:41:34,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104962198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:34,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:34,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 24] total 60 [2021-11-20 05:41:34,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948089075] [2021-11-20 05:41:34,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:34,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 05:41:34,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 05:41:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=3268, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:41:34,639 INFO L87 Difference]: Start difference. First operand 806 states and 887 transitions. Second operand has 60 states, 60 states have (on average 5.183333333333334) internal successors, (311), 60 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:41,660 INFO L93 Difference]: Finished difference Result 1103 states and 1213 transitions. [2021-11-20 05:41:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-20 05:41:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.183333333333334) internal successors, (311), 60 states have internal predecessors, (311), 0 states have call successors, (0), 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 163 [2021-11-20 05:41:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:41,661 INFO L225 Difference]: With dead ends: 1103 [2021-11-20 05:41:41,661 INFO L226 Difference]: Without dead ends: 1087 [2021-11-20 05:41:41,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 298 SyntacticMatches, 7 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4437 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2585, Invalid=14707, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 05:41:41,663 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 745 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:41,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1052 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 673 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2021-11-20 05:41:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-20 05:41:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 700. [2021-11-20 05:41:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 1.09585121602289) internal successors, (766), 699 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 766 transitions. [2021-11-20 05:41:41,671 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 766 transitions. Word has length 163 [2021-11-20 05:41:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:41,672 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 766 transitions. [2021-11-20 05:41:41,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.183333333333334) internal successors, (311), 60 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 766 transitions. [2021-11-20 05:41:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-20 05:41:41,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:41,673 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:41,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:41,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-20 05:41:41,874 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash 537474656, now seen corresponding path program 1 times [2021-11-20 05:41:41,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:41,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612592060] [2021-11-20 05:41:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:41,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-20 05:41:42,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612592060] [2021-11-20 05:41:42,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612592060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:42,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872073445] [2021-11-20 05:41:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:42,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:42,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:42,245 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:42,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-20 05:41:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 05:41:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:42,411 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:41:42,411 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 05:41:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-20 05:41:43,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-20 05:41:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872073445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:44,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:44,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 51 [2021-11-20 05:41:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507840007] [2021-11-20 05:41:44,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:44,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 05:41:44,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:44,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 05:41:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 05:41:44,137 INFO L87 Difference]: Start difference. First operand 700 states and 766 transitions. Second operand has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 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 05:41:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:45,001 INFO L93 Difference]: Finished difference Result 1076 states and 1174 transitions. [2021-11-20 05:41:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:41:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-20 05:41:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:45,002 INFO L225 Difference]: With dead ends: 1076 [2021-11-20 05:41:45,002 INFO L226 Difference]: Without dead ends: 1074 [2021-11-20 05:41:45,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=975, Invalid=3581, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 05:41:45,003 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 711 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:45,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 759 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:41:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-11-20 05:41:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 670. [2021-11-20 05:41:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.0911808669656202) internal successors, (730), 669 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 730 transitions. [2021-11-20 05:41:45,015 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 730 transitions. Word has length 165 [2021-11-20 05:41:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:45,015 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 730 transitions. [2021-11-20 05:41:45,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.627450980392157) internal successors, (185), 51 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 05:41:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 730 transitions. [2021-11-20 05:41:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 05:41:45,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:45,016 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 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 05:41:45,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:45,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-20 05:41:45,217 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:45,218 INFO L85 PathProgramCache]: Analyzing trace with hash 851665605, now seen corresponding path program 7 times [2021-11-20 05:41:45,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729821753] [2021-11-20 05:41:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:45,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 189 proven. 120 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:45,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:45,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729821753] [2021-11-20 05:41:45,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729821753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:45,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648329329] [2021-11-20 05:41:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:41:45,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:45,707 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:45,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-20 05:41:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 05:41:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:45,880 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:41:45,881 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 05:41:45,883 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 05:41:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 189 proven. 120 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:47,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 189 proven. 120 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:41:48,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648329329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:48,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:48,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 55 [2021-11-20 05:41:48,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787330007] [2021-11-20 05:41:48,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 05:41:48,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:48,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 05:41:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2489, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 05:41:48,078 INFO L87 Difference]: Start difference. First operand 670 states and 730 transitions. Second operand has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 55 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:49,332 INFO L93 Difference]: Finished difference Result 1644 states and 1778 transitions. [2021-11-20 05:41:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 05:41:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 55 states have internal predecessors, (276), 0 states have call successors, (0), 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 167 [2021-11-20 05:41:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:49,334 INFO L225 Difference]: With dead ends: 1644 [2021-11-20 05:41:49,334 INFO L226 Difference]: Without dead ends: 1191 [2021-11-20 05:41:49,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1134, Invalid=4416, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 05:41:49,335 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 447 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:49,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1470 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:41:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-20 05:41:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1017. [2021-11-20 05:41:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 1.0905511811023623) internal successors, (1108), 1016 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1108 transitions. [2021-11-20 05:41:49,344 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1108 transitions. Word has length 167 [2021-11-20 05:41:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:49,344 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1108 transitions. [2021-11-20 05:41:49,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.0181818181818185) internal successors, (276), 55 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1108 transitions. [2021-11-20 05:41:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 05:41:49,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:49,346 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:41:49,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:49,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-20 05:41:49,547 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:49,547 INFO L85 PathProgramCache]: Analyzing trace with hash -73376458, now seen corresponding path program 4 times [2021-11-20 05:41:49,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484134251] [2021-11-20 05:41:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:49,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 62 proven. 141 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-20 05:41:49,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484134251] [2021-11-20 05:41:49,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484134251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126173119] [2021-11-20 05:41:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:41:49,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:49,858 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:49,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-20 05:41:49,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:41:49,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 05:41:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:50,024 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:41:50,024 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 05:41:50,027 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 05:41:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 146 proven. 147 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 05:41:51,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 145 proven. 148 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-20 05:41:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126173119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:52,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:52,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 57 [2021-11-20 05:41:52,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082458306] [2021-11-20 05:41:52,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:52,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 05:41:52,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 05:41:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2870, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 05:41:52,628 INFO L87 Difference]: Start difference. First operand 1017 states and 1108 transitions. Second operand has 57 states, 57 states have (on average 6.052631578947368) internal successors, (345), 57 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:41:58,272 INFO L93 Difference]: Finished difference Result 1918 states and 2076 transitions. [2021-11-20 05:41:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-20 05:41:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.052631578947368) internal successors, (345), 57 states have internal predecessors, (345), 0 states have call successors, (0), 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 170 [2021-11-20 05:41:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:41:58,273 INFO L225 Difference]: With dead ends: 1918 [2021-11-20 05:41:58,273 INFO L226 Difference]: Without dead ends: 804 [2021-11-20 05:41:58,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3222 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2548, Invalid=13964, Unknown=0, NotChecked=0, Total=16512 [2021-11-20 05:41:58,275 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 1659 mSDsluCounter, 5237 mSDsCounter, 0 mSdLazyCounter, 4212 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 5507 SdHoareTripleChecker+Invalid, 4371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:41:58,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1659 Valid, 5507 Invalid, 4371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4212 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 05:41:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-11-20 05:41:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 621. [2021-11-20 05:41:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.0903225806451613) internal successors, (676), 620 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 676 transitions. [2021-11-20 05:41:58,280 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 676 transitions. Word has length 170 [2021-11-20 05:41:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:41:58,280 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 676 transitions. [2021-11-20 05:41:58,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.052631578947368) internal successors, (345), 57 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 676 transitions. [2021-11-20 05:41:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-20 05:41:58,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:41:58,281 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 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 05:41:58,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-20 05:41:58,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:58,482 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:41:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:41:58,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1202024712, now seen corresponding path program 8 times [2021-11-20 05:41:58,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:41:58,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128776733] [2021-11-20 05:41:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:41:58,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:41:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:41:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 66 proven. 177 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 05:41:58,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:41:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128776733] [2021-11-20 05:41:58,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128776733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:41:58,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651822464] [2021-11-20 05:41:58,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:41:58,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:41:58,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:41:58,815 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:41:58,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-20 05:41:58,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:41:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 217 conjunts are in the unsatisfiable core [2021-11-20 05:41:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:59,798 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 05:42:02,603 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 05:42:02,603 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 05:42:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 33 proven. 480 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:42:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:04,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:42:04,877 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 05:42:04,923 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 05:42:04,932 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 05:42:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-20 05:42:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651822464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:06,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:06,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 48, 34] total 95 [2021-11-20 05:42:06,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455915624] [2021-11-20 05:42:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:06,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-20 05:42:06,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-20 05:42:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8649, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 05:42:06,085 INFO L87 Difference]: Start difference. First operand 621 states and 676 transitions. Second operand has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 95 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:15,887 INFO L93 Difference]: Finished difference Result 2127 states and 2315 transitions. [2021-11-20 05:42:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-11-20 05:42:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 95 states have internal predecessors, (374), 0 states have call successors, (0), 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 171 [2021-11-20 05:42:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:15,889 INFO L225 Difference]: With dead ends: 2127 [2021-11-20 05:42:15,889 INFO L226 Difference]: Without dead ends: 1617 [2021-11-20 05:42:15,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7384 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=877, Invalid=34655, Unknown=0, NotChecked=0, Total=35532 [2021-11-20 05:42:15,891 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 1122 mSDsluCounter, 15548 mSDsCounter, 0 mSdLazyCounter, 7155 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 15843 SdHoareTripleChecker+Invalid, 9542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 7155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2310 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:15,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 15843 Invalid, 9542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 7155 Invalid, 0 Unknown, 2310 Unchecked, 3.6s Time] [2021-11-20 05:42:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-20 05:42:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 722. [2021-11-20 05:42:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.0943134535367545) internal successors, (789), 721 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 789 transitions. [2021-11-20 05:42:15,900 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 789 transitions. Word has length 171 [2021-11-20 05:42:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 789 transitions. [2021-11-20 05:42:15,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.9368421052631577) internal successors, (374), 95 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 789 transitions. [2021-11-20 05:42:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 05:42:15,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:15,902 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 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 05:42:15,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:16,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:16,103 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1712912335, now seen corresponding path program 9 times [2021-11-20 05:42:16,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497361941] [2021-11-20 05:42:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:16,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-20 05:42:16,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:16,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497361941] [2021-11-20 05:42:16,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497361941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:16,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048325369] [2021-11-20 05:42:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:42:16,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:16,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:16,555 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:16,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-20 05:42:17,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 05:42:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-20 05:42:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 196 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-20 05:42:18,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:19,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:42:19,391 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 15 treesize of output 19 [2021-11-20 05:42:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 70 proven. 196 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-20 05:42:20,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048325369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:20,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:20,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-11-20 05:42:20,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330201969] [2021-11-20 05:42:20,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:20,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 05:42:20,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 05:42:20,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3025, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 05:42:20,181 INFO L87 Difference]: Start difference. First operand 722 states and 789 transitions. Second operand has 58 states, 58 states have (on average 5.172413793103448) internal successors, (300), 58 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:25,670 INFO L93 Difference]: Finished difference Result 1632 states and 1779 transitions. [2021-11-20 05:42:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-20 05:42:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.172413793103448) internal successors, (300), 58 states have internal predecessors, (300), 0 states have call successors, (0), 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 178 [2021-11-20 05:42:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:25,672 INFO L225 Difference]: With dead ends: 1632 [2021-11-20 05:42:25,672 INFO L226 Difference]: Without dead ends: 1278 [2021-11-20 05:42:25,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2833, Invalid=13169, Unknown=0, NotChecked=0, Total=16002 [2021-11-20 05:42:25,674 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 2856 mSDsluCounter, 3975 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2856 SdHoareTripleChecker+Valid, 4154 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:25,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2856 Valid, 4154 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 05:42:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-20 05:42:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 942. [2021-11-20 05:42:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 1.0977683315621678) internal successors, (1033), 941 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1033 transitions. [2021-11-20 05:42:25,685 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1033 transitions. Word has length 178 [2021-11-20 05:42:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:25,685 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1033 transitions. [2021-11-20 05:42:25,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.172413793103448) internal successors, (300), 58 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1033 transitions. [2021-11-20 05:42:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-20 05:42:25,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:25,687 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:25,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:25,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-20 05:42:25,891 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -271438686, now seen corresponding path program 5 times [2021-11-20 05:42:25,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278960003] [2021-11-20 05:42:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:25,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 153 proven. 181 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-20 05:42:26,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278960003] [2021-11-20 05:42:26,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278960003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325189227] [2021-11-20 05:42:26,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:42:26,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:26,254 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:26,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-20 05:42:27,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 05:42:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:27,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 05:42:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:27,767 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:42:27,767 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 05:42:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 153 proven. 181 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-20 05:42:29,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 153 proven. 181 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-20 05:42:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325189227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:30,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:30,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 47 [2021-11-20 05:42:30,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647693416] [2021-11-20 05:42:30,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:30,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 05:42:30,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:30,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 05:42:30,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 05:42:30,056 INFO L87 Difference]: Start difference. First operand 942 states and 1033 transitions. Second operand has 47 states, 47 states have (on average 5.787234042553192) internal successors, (272), 47 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:30,821 INFO L93 Difference]: Finished difference Result 1280 states and 1395 transitions. [2021-11-20 05:42:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 05:42:30,821 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.787234042553192) internal successors, (272), 47 states have internal predecessors, (272), 0 states have call successors, (0), 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 183 [2021-11-20 05:42:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:30,822 INFO L225 Difference]: With dead ends: 1280 [2021-11-20 05:42:30,823 INFO L226 Difference]: Without dead ends: 942 [2021-11-20 05:42:30,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=687, Invalid=2619, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 05:42:30,823 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 512 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:30,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 1042 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 05:42:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-20 05:42:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2021-11-20 05:42:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 1.0967056323060573) internal successors, (1032), 941 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1032 transitions. [2021-11-20 05:42:30,831 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1032 transitions. Word has length 183 [2021-11-20 05:42:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:30,832 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1032 transitions. [2021-11-20 05:42:30,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.787234042553192) internal successors, (272), 47 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1032 transitions. [2021-11-20 05:42:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 05:42:30,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:30,833 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:30,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:31,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-20 05:42:31,034 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:31,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1581111259, now seen corresponding path program 6 times [2021-11-20 05:42:31,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:31,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760261408] [2021-11-20 05:42:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:31,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 125 proven. 166 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-20 05:42:31,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760261408] [2021-11-20 05:42:31,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760261408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298238920] [2021-11-20 05:42:31,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:42:31,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:31,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:31,369 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-20 05:42:33,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 05:42:33,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-20 05:42:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:33,398 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 14 treesize of output 10 [2021-11-20 05:42:34,452 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 05:42:34,452 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 05:42:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 94 proven. 280 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-20 05:42:34,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 94 proven. 195 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-20 05:42:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298238920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:35,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 20] total 50 [2021-11-20 05:42:35,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340692559] [2021-11-20 05:42:35,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:35,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 05:42:35,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 05:42:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2324, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 05:42:35,514 INFO L87 Difference]: Start difference. First operand 942 states and 1032 transitions. Second operand has 50 states, 50 states have (on average 4.82) internal successors, (241), 50 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 05:42:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:37,233 INFO L93 Difference]: Finished difference Result 1162 states and 1263 transitions. [2021-11-20 05:42:37,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 05:42:37,233 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 50 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) Word has length 187 [2021-11-20 05:42:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:37,234 INFO L225 Difference]: With dead ends: 1162 [2021-11-20 05:42:37,234 INFO L226 Difference]: Without dead ends: 600 [2021-11-20 05:42:37,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 05:42:37,235 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 645 mSDsluCounter, 2699 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 2781 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:37,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 2781 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1634 Invalid, 0 Unknown, 499 Unchecked, 0.9s Time] [2021-11-20 05:42:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-20 05:42:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2021-11-20 05:42:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.0951585976627713) internal successors, (656), 599 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 656 transitions. [2021-11-20 05:42:37,243 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 656 transitions. Word has length 187 [2021-11-20 05:42:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:37,244 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 656 transitions. [2021-11-20 05:42:37,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.82) internal successors, (241), 50 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 05:42:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 656 transitions. [2021-11-20 05:42:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 05:42:37,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:37,245 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:37,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:37,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-11-20 05:42:37,451 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1193179046, now seen corresponding path program 7 times [2021-11-20 05:42:37,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306388297] [2021-11-20 05:42:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:37,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 195 proven. 186 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:42:37,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306388297] [2021-11-20 05:42:37,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306388297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030244070] [2021-11-20 05:42:37,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:42:37,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:37,966 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-20 05:42:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-20 05:42:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:38,153 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:42:38,153 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 05:42:38,156 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 05:42:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 197 proven. 184 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:42:39,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 196 proven. 185 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-20 05:42:40,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030244070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:40,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:40,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 60 [2021-11-20 05:42:40,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330553886] [2021-11-20 05:42:40,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:40,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 05:42:40,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:40,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 05:42:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=2982, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 05:42:40,733 INFO L87 Difference]: Start difference. First operand 600 states and 656 transitions. Second operand has 60 states, 60 states have (on average 5.4) internal successors, (324), 60 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 05:42:42,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:42,271 INFO L93 Difference]: Finished difference Result 1578 states and 1711 transitions. [2021-11-20 05:42:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 05:42:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.4) internal successors, (324), 60 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 189 [2021-11-20 05:42:42,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:42,272 INFO L225 Difference]: With dead ends: 1578 [2021-11-20 05:42:42,272 INFO L226 Difference]: Without dead ends: 755 [2021-11-20 05:42:42,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1303, Invalid=5177, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 05:42:42,273 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 411 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:42,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 2327 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 05:42:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-20 05:42:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 751. [2021-11-20 05:42:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.0813333333333333) internal successors, (811), 750 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 811 transitions. [2021-11-20 05:42:42,280 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 811 transitions. Word has length 189 [2021-11-20 05:42:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:42,280 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 811 transitions. [2021-11-20 05:42:42,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.4) internal successors, (324), 60 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 05:42:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 811 transitions. [2021-11-20 05:42:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-20 05:42:42,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:42,281 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:42,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:42,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:42,482 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -716837299, now seen corresponding path program 10 times [2021-11-20 05:42:42,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:42,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092894725] [2021-11-20 05:42:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:42,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 100 proven. 153 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-20 05:42:42,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092894725] [2021-11-20 05:42:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092894725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789312353] [2021-11-20 05:42:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:42:42,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:42,904 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:42,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-20 05:42:43,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:42:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 05:42:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:43,070 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:42:43,070 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 05:42:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 100 proven. 153 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-20 05:42:44,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 100 proven. 153 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-20 05:42:45,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789312353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:45,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:45,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 61 [2021-11-20 05:42:45,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444239608] [2021-11-20 05:42:45,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:45,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-20 05:42:45,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-20 05:42:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3027, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 05:42:45,222 INFO L87 Difference]: Start difference. First operand 751 states and 811 transitions. Second operand has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:46,459 INFO L93 Difference]: Finished difference Result 765 states and 815 transitions. [2021-11-20 05:42:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:42:46,460 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 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 189 [2021-11-20 05:42:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:46,461 INFO L225 Difference]: With dead ends: 765 [2021-11-20 05:42:46,461 INFO L226 Difference]: Without dead ends: 698 [2021-11-20 05:42:46,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1527, Invalid=5445, Unknown=0, NotChecked=0, Total=6972 [2021-11-20 05:42:46,462 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 512 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:46,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 781 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:42:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-20 05:42:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 691. [2021-11-20 05:42:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 1.0753623188405796) internal successors, (742), 690 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 742 transitions. [2021-11-20 05:42:46,468 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 742 transitions. Word has length 189 [2021-11-20 05:42:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 742 transitions. [2021-11-20 05:42:46,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 61 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 742 transitions. [2021-11-20 05:42:46,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 05:42:46,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:46,470 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:46,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:46,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:46,670 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash -438436976, now seen corresponding path program 11 times [2021-11-20 05:42:46,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:46,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430522694] [2021-11-20 05:42:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:46,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 120 proven. 318 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:42:47,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430522694] [2021-11-20 05:42:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430522694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:47,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529409131] [2021-11-20 05:42:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:42:47,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:47,235 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:47,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-20 05:42:49,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 05:42:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-20 05:42:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:49,264 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:42:49,264 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 9 treesize of output 15 [2021-11-20 05:42:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 153 proven. 285 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:42:51,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:54,133 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 190 proven. 248 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 05:42:54,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529409131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:54,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:42:54,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 24] total 74 [2021-11-20 05:42:54,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271527183] [2021-11-20 05:42:54,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 05:42:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:42:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 05:42:54,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4900, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 05:42:54,135 INFO L87 Difference]: Start difference. First operand 691 states and 742 transitions. Second operand has 75 states, 74 states have (on average 5.527027027027027) internal successors, (409), 75 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:58,766 INFO L93 Difference]: Finished difference Result 1110 states and 1192 transitions. [2021-11-20 05:42:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-20 05:42:58,767 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 5.527027027027027) internal successors, (409), 75 states have internal predecessors, (409), 0 states have call successors, (0), 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 193 [2021-11-20 05:42:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:58,768 INFO L225 Difference]: With dead ends: 1110 [2021-11-20 05:42:58,768 INFO L226 Difference]: Without dead ends: 1110 [2021-11-20 05:42:58,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3426, Invalid=13344, Unknown=0, NotChecked=0, Total=16770 [2021-11-20 05:42:58,769 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2207 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 2986 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2207 Valid, 2986 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:42:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-20 05:42:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 715. [2021-11-20 05:42:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.0756302521008403) internal successors, (768), 714 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 768 transitions. [2021-11-20 05:42:58,781 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 768 transitions. Word has length 193 [2021-11-20 05:42:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:58,782 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 768 transitions. [2021-11-20 05:42:58,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 5.527027027027027) internal successors, (409), 75 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:42:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 768 transitions. [2021-11-20 05:42:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-20 05:42:58,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:58,784 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:58,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:58,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:58,991 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:42:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -941809239, now seen corresponding path program 8 times [2021-11-20 05:42:58,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:42:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108378584] [2021-11-20 05:42:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:58,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:42:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 73 proven. 202 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:42:59,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:42:59,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108378584] [2021-11-20 05:42:59,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108378584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:59,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738765924] [2021-11-20 05:42:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:42:59,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:42:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:59,439 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:42:59,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-20 05:42:59,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:42:59,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:42:59,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 199 conjunts are in the unsatisfiable core [2021-11-20 05:42:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:00,039 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 05:43:02,439 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 05:43:02,439 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 05:43:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 36 proven. 362 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-20 05:43:02,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:10,541 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString1~0#1.base| Int) (|v_ULTIMATE.start_cstrstr_#t~post17#1.offset_544| Int)) (let ((.cse0 (select (select |c_#memory_int| |ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_544|)))) (or (not (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 7)))) (= .cse0 0)))) is different from false [2021-11-20 05:43:10,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:43:10,552 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 05:43:10,628 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 05:43:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 36 proven. 312 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-20 05:43:11,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738765924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:11,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:43:11,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33, 35] total 73 [2021-11-20 05:43:11,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517129546] [2021-11-20 05:43:11,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:11,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 05:43:11,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:43:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 05:43:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4912, Unknown=3, NotChecked=140, Total=5256 [2021-11-20 05:43:11,033 INFO L87 Difference]: Start difference. First operand 715 states and 768 transitions. Second operand has 73 states, 73 states have (on average 4.821917808219178) internal successors, (352), 73 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:15,707 INFO L93 Difference]: Finished difference Result 842 states and 907 transitions. [2021-11-20 05:43:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-20 05:43:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.821917808219178) internal successors, (352), 73 states have internal predecessors, (352), 0 states have call successors, (0), 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 193 [2021-11-20 05:43:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:15,708 INFO L225 Difference]: With dead ends: 842 [2021-11-20 05:43:15,708 INFO L226 Difference]: Without dead ends: 834 [2021-11-20 05:43:15,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 362 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=410, Invalid=10303, Unknown=3, NotChecked=204, Total=10920 [2021-11-20 05:43:15,709 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 109 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:15,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 3228 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1301 Invalid, 0 Unknown, 574 Unchecked, 0.6s Time] [2021-11-20 05:43:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-20 05:43:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 778. [2021-11-20 05:43:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0785070785070785) internal successors, (838), 777 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 838 transitions. [2021-11-20 05:43:15,717 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 838 transitions. Word has length 193 [2021-11-20 05:43:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:15,717 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 838 transitions. [2021-11-20 05:43:15,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.821917808219178) internal successors, (352), 73 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 838 transitions. [2021-11-20 05:43:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-20 05:43:15,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:15,719 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 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 05:43:15,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:15,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-20 05:43:15,920 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:43:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:15,920 INFO L85 PathProgramCache]: Analyzing trace with hash 722638226, now seen corresponding path program 12 times [2021-11-20 05:43:15,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280686993] [2021-11-20 05:43:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:15,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 315 proven. 153 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-20 05:43:16,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280686993] [2021-11-20 05:43:16,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280686993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:43:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937570896] [2021-11-20 05:43:16,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:43:16,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:43:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:16,442 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:43:16,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-20 05:43:19,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-20 05:43:19,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:43:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 05:43:19,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:19,560 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:43:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 05:43:19,563 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 05:43:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 315 proven. 153 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-20 05:43:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 315 proven. 153 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2021-11-20 05:43:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937570896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:22,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:43:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 64 [2021-11-20 05:43:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888769849] [2021-11-20 05:43:22,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:22,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 05:43:22,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:43:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 05:43:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 05:43:22,777 INFO L87 Difference]: Start difference. First operand 778 states and 838 transitions. Second operand has 64 states, 64 states have (on average 5.515625) internal successors, (353), 64 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:25,048 INFO L93 Difference]: Finished difference Result 1926 states and 2067 transitions. [2021-11-20 05:43:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 05:43:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.515625) internal successors, (353), 64 states have internal predecessors, (353), 0 states have call successors, (0), 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 201 [2021-11-20 05:43:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:25,050 INFO L225 Difference]: With dead ends: 1926 [2021-11-20 05:43:25,050 INFO L226 Difference]: Without dead ends: 1228 [2021-11-20 05:43:25,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1926, Invalid=7974, Unknown=0, NotChecked=0, Total=9900 [2021-11-20 05:43:25,052 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 677 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:25,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 2211 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:43:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-11-20 05:43:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 963. [2021-11-20 05:43:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.0925155925155925) internal successors, (1051), 962 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1051 transitions. [2021-11-20 05:43:25,063 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1051 transitions. Word has length 201 [2021-11-20 05:43:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:25,063 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1051 transitions. [2021-11-20 05:43:25,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.515625) internal successors, (353), 64 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1051 transitions. [2021-11-20 05:43:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-20 05:43:25,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:25,065 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:43:25,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:25,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-20 05:43:25,273 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:43:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2862037, now seen corresponding path program 9 times [2021-11-20 05:43:25,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:25,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079555282] [2021-11-20 05:43:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:25,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 84 proven. 254 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-20 05:43:25,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079555282] [2021-11-20 05:43:25,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079555282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:43:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721468076] [2021-11-20 05:43:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:43:25,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:43:25,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:25,747 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:43:25,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-20 05:43:26,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 05:43:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:43:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 05:43:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 84 proven. 250 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 05:43:27,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 92 proven. 242 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-20 05:43:29,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721468076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:29,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:43:29,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2021-11-20 05:43:29,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808250015] [2021-11-20 05:43:29,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:29,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 05:43:29,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:43:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 05:43:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 05:43:29,961 INFO L87 Difference]: Start difference. First operand 963 states and 1051 transitions. Second operand has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 38 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:30,909 INFO L93 Difference]: Finished difference Result 1133 states and 1219 transitions. [2021-11-20 05:43:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:43:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 38 states have internal predecessors, (235), 0 states have call successors, (0), 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 201 [2021-11-20 05:43:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:30,910 INFO L225 Difference]: With dead ends: 1133 [2021-11-20 05:43:30,910 INFO L226 Difference]: Without dead ends: 317 [2021-11-20 05:43:30,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 05:43:30,911 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 485 mSDsluCounter, 3095 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:30,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 3257 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:43:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-20 05:43:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-11-20 05:43:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0791139240506329) internal successors, (341), 316 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 341 transitions. [2021-11-20 05:43:30,914 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 341 transitions. Word has length 201 [2021-11-20 05:43:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 341 transitions. [2021-11-20 05:43:30,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.184210526315789) internal successors, (235), 38 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:43:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 341 transitions. [2021-11-20 05:43:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-20 05:43:30,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:30,916 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 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 05:43:30,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:31,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-20 05:43:31,123 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 05:43:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:31,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1356044056, now seen corresponding path program 13 times [2021-11-20 05:43:31,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:43:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717713452] [2021-11-20 05:43:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:31,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:43:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 88 proven. 324 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-20 05:43:31,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:43:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717713452] [2021-11-20 05:43:31,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717713452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:43:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630755995] [2021-11-20 05:43:31,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 05:43:31,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:43:31,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:43:31,562 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:43:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a95a0386-ce50-4550-89b4-a9f4681aebff/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-20 05:43:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 257 conjunts are in the unsatisfiable core [2021-11-20 05:43:31,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:32,509 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 05:43:36,050 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 05:43:36,050 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 05:43:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 43 proven. 787 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 05:43:36,129 INFO L328 TraceCheckSpWp]: Computing backward predicates...