./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0 --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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:02:25,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:02:25,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:02:25,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:02:25,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:02:25,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:02:25,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:02:25,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:02:25,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:02:25,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:02:25,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:02:25,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:02:25,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:02:25,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:02:25,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:02:25,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:02:25,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:02:25,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:02:25,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:02:25,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:02:25,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:02:25,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:02:25,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:02:25,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:02:25,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:02:25,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:02:25,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:02:25,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:02:25,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:02:25,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:02:25,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:02:25,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:02:25,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:02:25,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:02:25,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:02:25,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:02:25,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:02:25,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:02:25,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:02:25,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:02:25,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:02:25,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 15:02:25,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:02:25,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:02:25,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:02:25,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:02:25,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:02:25,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:02:25,699 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:02:25,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:02:25,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:02:25,700 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 15:02:25,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:02:25,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:02:25,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:02:25,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 15:02:25,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 15:02:25,703 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 15:02:25,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:02:25,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 15:02:25,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:02:25,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:02:25,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:02:25,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:02:25,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:02:25,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:02:25,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:02:25,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:02:25,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:02:25,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:02:25,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:02:25,709 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_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2021-11-22 15:02:26,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:02:26,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:02:26,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:02:26,073 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:02:26,074 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:02:26,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2021-11-22 15:02:26,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/data/654b30831/b875f08af7cc460cbdccff7bf73d8a5e/FLAG56a0c04d6 [2021-11-22 15:02:26,844 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:02:26,844 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2021-11-22 15:02:26,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/data/654b30831/b875f08af7cc460cbdccff7bf73d8a5e/FLAG56a0c04d6 [2021-11-22 15:02:27,211 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/data/654b30831/b875f08af7cc460cbdccff7bf73d8a5e [2021-11-22 15:02:27,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:02:27,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:02:27,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:02:27,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:02:27,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:02:27,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629f8ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27, skipping insertion in model container [2021-11-22 15:02:27,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:02:27,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:02:27,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:02:27,497 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:02:27,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:02:27,541 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:02:27,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27 WrapperNode [2021-11-22 15:02:27,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:02:27,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:02:27,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:02:27,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:02:27,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,605 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2021-11-22 15:02:27,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:02:27,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:02:27,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:02:27,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:02:27,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:02:27,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:02:27,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:02:27,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:02:27,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (1/1) ... [2021-11-22 15:02:27,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:02:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:27,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:02:27,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:02:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:02:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:02:27,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:02:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:02:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:02:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:02:27,887 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:02:27,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:02:28,199 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:02:28,207 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:02:28,207 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 15:02:28,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:02:28 BoogieIcfgContainer [2021-11-22 15:02:28,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:02:28,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:02:28,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:02:28,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:02:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:02:27" (1/3) ... [2021-11-22 15:02:28,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffe2be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:02:28, skipping insertion in model container [2021-11-22 15:02:28,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:02:27" (2/3) ... [2021-11-22 15:02:28,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffe2be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:02:28, skipping insertion in model container [2021-11-22 15:02:28,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:02:28" (3/3) ... [2021-11-22 15:02:28,221 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2021-11-22 15:02:28,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:02:28,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-22 15:02:28,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:02:28,298 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 [2021-11-22 15:02:28,299 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-22 15:02:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) [2021-11-22 15:02:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 15:02:28,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:28,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 15:02:28,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2021-11-22 15:02:28,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:28,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259503540] [2021-11-22 15:02:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:28,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:28,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259503540] [2021-11-22 15:02:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259503540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:28,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:28,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:02:28,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516892030] [2021-11-22 15:02:28,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:28,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:02:28,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:02:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:02:28,707 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:28,802 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-22 15:02:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:02:28,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-22 15:02:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:28,818 INFO L225 Difference]: With dead ends: 59 [2021-11-22 15:02:28,818 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 15:02:28,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:02:28,830 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:28,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 15:02:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-11-22 15:02:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 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) [2021-11-22 15:02:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-22 15:02:28,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2021-11-22 15:02:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-22 15:02:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-22 15:02:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 15:02:28,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:28,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 15:02:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:02:28,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2021-11-22 15:02:28,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081623821] [2021-11-22 15:02:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:28,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:28,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081623821] [2021-11-22 15:02:28,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081623821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:28,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:28,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:02:28,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846580321] [2021-11-22 15:02:28,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:28,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:02:29,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:02:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:02:29,004 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:29,078 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-11-22 15:02:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:02:29,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 15:02:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:29,083 INFO L225 Difference]: With dead ends: 58 [2021-11-22 15:02:29,083 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:02:29,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:02:29,091 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:29,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:02:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-11-22 15:02:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 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) [2021-11-22 15:02:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-22 15:02:29,113 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-22 15:02:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:29,114 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-22 15:02:29,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-22 15:02:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 15:02:29,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:29,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 15:02:29,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:02:29,121 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2021-11-22 15:02:29,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:29,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746005260] [2021-11-22 15:02:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:29,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:29,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746005260] [2021-11-22 15:02:29,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746005260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:29,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:29,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:02:29,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338721170] [2021-11-22 15:02:29,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:29,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:29,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:02:29,215 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:29,270 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-22 15:02:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:02:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 15:02:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:29,272 INFO L225 Difference]: With dead ends: 32 [2021-11-22 15:02:29,272 INFO L226 Difference]: Without dead ends: 32 [2021-11-22 15:02:29,272 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 [2021-11-22 15:02:29,274 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:29,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:02:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-22 15:02:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-22 15:02:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-22 15:02:29,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-22 15:02:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:29,281 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-22 15:02:29,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-22 15:02:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 15:02:29,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:29,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 15:02:29,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 15:02:29,284 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2021-11-22 15:02:29,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:29,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511363496] [2021-11-22 15:02:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:29,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:29,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511363496] [2021-11-22 15:02:29,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511363496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:29,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:29,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:02:29,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201431272] [2021-11-22 15:02:29,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:29,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:29,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:02:29,406 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:29,530 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-11-22 15:02:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:02:29,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-22 15:02:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:29,532 INFO L225 Difference]: With dead ends: 55 [2021-11-22 15:02:29,532 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 15:02:29,533 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 [2021-11-22 15:02:29,535 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:29,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 15:02:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-11-22 15:02:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 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) [2021-11-22 15:02:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-22 15:02:29,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-11-22 15:02:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:29,544 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-22 15:02:29,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-22 15:02:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 15:02:29,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:29,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:29,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 15:02:29,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2021-11-22 15:02:29,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:29,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200439252] [2021-11-22 15:02:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:29,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:29,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:29,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200439252] [2021-11-22 15:02:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200439252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:29,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:29,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:02:29,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505461269] [2021-11-22 15:02:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:29,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:29,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:02:29,607 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:29,743 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-22 15:02:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:02:29,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-22 15:02:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:29,745 INFO L225 Difference]: With dead ends: 60 [2021-11-22 15:02:29,745 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 15:02:29,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:02:29,747 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:29,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 15:02:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2021-11-22 15:02:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-22 15:02:29,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2021-11-22 15:02:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:29,755 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-22 15:02:29,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-22 15:02:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 15:02:29,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:29,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:29,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 15:02:29,757 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:29,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:29,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2021-11-22 15:02:29,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:29,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552391264] [2021-11-22 15:02:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:29,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:29,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:29,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552391264] [2021-11-22 15:02:29,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552391264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510758785] [2021-11-22 15:02:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:29,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:29,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:29,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:02:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 15:02:29,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:30,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510758785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:30,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:30,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-22 15:02:30,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140037727] [2021-11-22 15:02:30,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:30,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:02:30,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:02:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:02:30,154 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:30,283 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2021-11-22 15:02:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:02:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 15:02:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:30,288 INFO L225 Difference]: With dead ends: 130 [2021-11-22 15:02:30,288 INFO L226 Difference]: Without dead ends: 130 [2021-11-22 15:02:30,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:02:30,303 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:30,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-22 15:02:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2021-11-22 15:02:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-22 15:02:30,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2021-11-22 15:02:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:30,322 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-22 15:02:30,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-22 15:02:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:02:30,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:30,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:30,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:30,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2021-11-22 15:02:30,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:30,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820977367] [2021-11-22 15:02:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:30,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:30,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820977367] [2021-11-22 15:02:30,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820977367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256757940] [2021-11-22 15:02:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:30,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:30,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:02:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 15:02:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:30,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:02:30,851 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:02:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:31,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:31,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256757940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:31,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:31,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-22 15:02:31,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106715227] [2021-11-22 15:02:31,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:31,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:02:31,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:31,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:02:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:02:31,210 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2021-11-22 15:02:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:31,555 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2021-11-22 15:02:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:02:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 11 [2021-11-22 15:02:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:31,564 INFO L225 Difference]: With dead ends: 129 [2021-11-22 15:02:31,564 INFO L226 Difference]: Without dead ends: 129 [2021-11-22 15:02:31,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:02:31,572 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:31,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-22 15:02:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2021-11-22 15:02:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-22 15:02:31,586 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2021-11-22 15:02:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-22 15:02:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2021-11-22 15:02:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-22 15:02:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 15:02:31,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:31,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:31,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 15:02:31,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:31,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2021-11-22 15:02:31,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:31,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92107398] [2021-11-22 15:02:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:31,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:31,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:31,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92107398] [2021-11-22 15:02:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92107398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145270541] [2021-11-22 15:02:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:31,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:31,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:31,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:02:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:02:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:32,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145270541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:32,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:32,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-22 15:02:32,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457314962] [2021-11-22 15:02:32,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:32,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 15:02:32,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 15:02:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:02:32,125 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:32,348 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-11-22 15:02:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:02:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 15:02:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:32,351 INFO L225 Difference]: With dead ends: 88 [2021-11-22 15:02:32,351 INFO L226 Difference]: Without dead ends: 88 [2021-11-22 15:02:32,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:02:32,357 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:32,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:32,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-22 15:02:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2021-11-22 15:02:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-22 15:02:32,375 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2021-11-22 15:02:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-22 15:02:32,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-22 15:02:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:02:32,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:32,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:32,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 15:02:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 15:02:32,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2021-11-22 15:02:32,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:32,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215507651] [2021-11-22 15:02:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:32,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 15:02:32,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:32,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215507651] [2021-11-22 15:02:32,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215507651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:32,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:32,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:02:32,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634759664] [2021-11-22 15:02:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:32,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 15:02:32,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 15:02:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:02:32,693 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:32,723 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-22 15:02:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:02:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-11-22 15:02:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:32,725 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:02:32,725 INFO L226 Difference]: Without dead ends: 46 [2021-11-22 15:02:32,725 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 [2021-11-22 15:02:32,733 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:32,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:02:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-22 15:02:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-22 15:02:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-22 15:02:32,749 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2021-11-22 15:02:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:32,749 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-22 15:02:32,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-22 15:02:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:02:32,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:32,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:32,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 15:02:32,752 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:32,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:32,753 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2021-11-22 15:02:32,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:32,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048192713] [2021-11-22 15:02:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:32,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:32,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:32,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048192713] [2021-11-22 15:02:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048192713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:32,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:32,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:02:32,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611775666] [2021-11-22 15:02:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:32,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:02:32,865 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:32,902 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-22 15:02:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:02:32,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 15:02:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:32,904 INFO L225 Difference]: With dead ends: 76 [2021-11-22 15:02:32,904 INFO L226 Difference]: Without dead ends: 76 [2021-11-22 15:02:32,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:02:32,906 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:32,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:02:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-22 15:02:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-11-22 15:02:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-22 15:02:32,921 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2021-11-22 15:02:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-22 15:02:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-22 15:02:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:02:32,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:32,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:32,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 15:02:32,923 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:32,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2021-11-22 15:02:32,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:32,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308462861] [2021-11-22 15:02:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:32,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:33,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:33,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308462861] [2021-11-22 15:02:33,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308462861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:33,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928419795] [2021-11-22 15:02:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:33,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:33,057 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:33,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:02:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:02:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:33,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:33,446 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 [2021-11-22 15:02:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:33,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928419795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:33,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:33,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-22 15:02:33,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103238034] [2021-11-22 15:02:33,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:02:33,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:02:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:02:33,574 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:33,685 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-22 15:02:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 15:02:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-11-22 15:02:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:33,687 INFO L225 Difference]: With dead ends: 80 [2021-11-22 15:02:33,687 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 15:02:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:02:33,688 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:33,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:33,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 15:02:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-11-22 15:02:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-22 15:02:33,696 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2021-11-22 15:02:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:33,696 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-22 15:02:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-22 15:02:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:02:33,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:33,698 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-22 15:02:33,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 15:02:33,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:33,923 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2021-11-22 15:02:33,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:33,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114005044] [2021-11-22 15:02:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:33,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:02:34,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:34,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114005044] [2021-11-22 15:02:34,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114005044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:34,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:02:34,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 15:02:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087097182] [2021-11-22 15:02:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:34,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:02:34,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:02:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:02:34,085 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:34,200 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-22 15:02:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:02:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 15:02:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:34,204 INFO L225 Difference]: With dead ends: 86 [2021-11-22 15:02:34,204 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 15:02:34,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-22 15:02:34,205 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:34,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:34,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 15:02:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-11-22 15:02:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-11-22 15:02:34,222 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2021-11-22 15:02:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:34,222 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-11-22 15:02:34,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-11-22 15:02:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 15:02:34,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:34,226 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] [2021-11-22 15:02:34,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 15:02:34,227 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2021-11-22 15:02:34,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265409834] [2021-11-22 15:02:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:34,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:34,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265409834] [2021-11-22 15:02:34,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265409834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895272279] [2021-11-22 15:02:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:34,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:34,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:02:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:02:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:34,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:02:34,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895272279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:34,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:02:34,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-22 15:02:34,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506859868] [2021-11-22 15:02:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:34,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:34,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:02:34,667 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:34,690 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-22 15:02:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:02:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 15:02:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:34,693 INFO L225 Difference]: With dead ends: 62 [2021-11-22 15:02:34,693 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 15:02:34,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 15:02:34,695 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:34,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2021-11-22 15:02:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 15:02:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-22 15:02:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-22 15:02:34,711 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2021-11-22 15:02:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:34,712 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-22 15:02:34,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-22 15:02:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:02:34,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:34,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:02:34,932 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2021-11-22 15:02:34,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:34,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477398084] [2021-11-22 15:02:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:34,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:02:35,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:35,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477398084] [2021-11-22 15:02:35,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477398084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:35,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279256556] [2021-11-22 15:02:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:35,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:35,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:35,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:02:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 15:02:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 15:02:35,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:02:35,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:02:35,397 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 17 treesize of output 10 [2021-11-22 15:02:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:35,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:35,500 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 14 treesize of output 12 [2021-11-22 15:02:35,509 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 [2021-11-22 15:02:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:02:35,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279256556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:35,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:35,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2021-11-22 15:02:35,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936300565] [2021-11-22 15:02:35,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:35,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 15:02:35,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 15:02:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-22 15:02:35,785 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:36,199 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-11-22 15:02:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 15:02:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 [2021-11-22 15:02:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:36,201 INFO L225 Difference]: With dead ends: 101 [2021-11-22 15:02:36,201 INFO L226 Difference]: Without dead ends: 101 [2021-11-22 15:02:36,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-11-22 15:02:36,203 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:36,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:02:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-22 15:02:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2021-11-22 15:02:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-22 15:02:36,209 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2021-11-22 15:02:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:36,210 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-22 15:02:36,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-22 15:02:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 15:02:36,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:36,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:36,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:36,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 15:02:36,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2021-11-22 15:02:36,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531798980] [2021-11-22 15:02:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:36,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:36,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531798980] [2021-11-22 15:02:36,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531798980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900318938] [2021-11-22 15:02:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:36,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:36,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:36,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:02:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:02:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 15:02:36,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900318938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:36,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:36,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-22 15:02:36,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308482559] [2021-11-22 15:02:36,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:36,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:02:36,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:02:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:02:36,933 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:37,161 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-22 15:02:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:02:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 15:02:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:37,163 INFO L225 Difference]: With dead ends: 66 [2021-11-22 15:02:37,163 INFO L226 Difference]: Without dead ends: 66 [2021-11-22 15:02:37,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-22 15:02:37,164 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:37,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 60 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-22 15:02:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-22 15:02:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 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) [2021-11-22 15:02:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-11-22 15:02:37,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2021-11-22 15:02:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:37,168 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-11-22 15:02:37,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-11-22 15:02:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:02:37,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:37,169 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:37,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:37,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:37,386 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2021-11-22 15:02:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990914405] [2021-11-22 15:02:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:37,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:37,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:37,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990914405] [2021-11-22 15:02:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990914405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:37,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034976860] [2021-11-22 15:02:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:37,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:37,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:02:37,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 15:02:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:37,631 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:37,631 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-22 15:02:37,636 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 [2021-11-22 15:02:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:38,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:02:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034976860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:38,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:02:38,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-11-22 15:02:38,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818104920] [2021-11-22 15:02:38,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:38,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 15:02:38,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 15:02:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:02:38,692 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:38,724 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-11-22 15:02:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:02:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 15:02:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:38,726 INFO L225 Difference]: With dead ends: 65 [2021-11-22 15:02:38,726 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 15:02:38,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:02:38,727 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:38,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2021-11-22 15:02:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 15:02:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-22 15:02:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-22 15:02:38,731 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 39 [2021-11-22 15:02:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:38,732 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-22 15:02:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-22 15:02:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-22 15:02:38,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:38,733 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:38,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:38,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:38,934 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2021-11-22 15:02:38,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:38,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952368625] [2021-11-22 15:02:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:38,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 15:02:39,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952368625] [2021-11-22 15:02:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952368625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259421594] [2021-11-22 15:02:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:39,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:39,040 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:39,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:02:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:39,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:02:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:39,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:02:39,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259421594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:39,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:39,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2021-11-22 15:02:39,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604083368] [2021-11-22 15:02:39,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:39,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:02:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:02:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:02:39,506 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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) [2021-11-22 15:02:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:39,832 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2021-11-22 15:02:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 15:02:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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 42 [2021-11-22 15:02:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:39,834 INFO L225 Difference]: With dead ends: 109 [2021-11-22 15:02:39,834 INFO L226 Difference]: Without dead ends: 109 [2021-11-22 15:02:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:02:39,836 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 195 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:39,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 70 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-22 15:02:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-11-22 15:02:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 80 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) [2021-11-22 15:02:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-22 15:02:39,841 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 42 [2021-11-22 15:02:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:39,841 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-22 15:02:39,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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) [2021-11-22 15:02:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-22 15:02:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 15:02:39,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:39,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:39,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:40,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 15:02:40,063 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2021-11-22 15:02:40,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661809457] [2021-11-22 15:02:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:40,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 15:02:40,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661809457] [2021-11-22 15:02:40,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661809457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:40,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629938127] [2021-11-22 15:02:40,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:40,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:40,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:40,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:02:40,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:40,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 15:02:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:40,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:40,772 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 24 treesize of output 20 [2021-11-22 15:02:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:41,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629938127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:41,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:41,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2021-11-22 15:02:41,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218273624] [2021-11-22 15:02:41,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:41,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:02:41,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:02:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:02:41,101 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-11-22 15:02:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:41,352 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-11-22 15:02:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:02:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) Word has length 49 [2021-11-22 15:02:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:41,355 INFO L225 Difference]: With dead ends: 125 [2021-11-22 15:02:41,355 INFO L226 Difference]: Without dead ends: 125 [2021-11-22 15:02:41,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:02:41,356 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 249 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:41,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 95 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:02:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-22 15:02:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2021-11-22 15:02:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0804597701149425) internal successors, (94), 90 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) [2021-11-22 15:02:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-11-22 15:02:41,362 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 49 [2021-11-22 15:02:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-11-22 15:02:41,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2021-11-22 15:02:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-11-22 15:02:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 15:02:41,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:41,365 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-22 15:02:41,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:41,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 15:02:41,583 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2021-11-22 15:02:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168064204] [2021-11-22 15:02:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:41,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:41,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168064204] [2021-11-22 15:02:41,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168064204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:41,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524681618] [2021-11-22 15:02:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:41,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:41,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:41,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:02:41,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:41,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:02:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:42,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 15:02:42,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524681618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:42,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:42,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-22 15:02:42,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987602892] [2021-11-22 15:02:42,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:42,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 15:02:42,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 15:02:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:02:42,432 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:43,055 INFO L93 Difference]: Finished difference Result 172 states and 178 transitions. [2021-11-22 15:02:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 15:02:43,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-22 15:02:43,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:43,057 INFO L225 Difference]: With dead ends: 172 [2021-11-22 15:02:43,057 INFO L226 Difference]: Without dead ends: 172 [2021-11-22 15:02:43,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 15:02:43,059 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 240 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:43,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 113 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:02:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-22 15:02:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-11-22 15:02:43,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 111 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-22 15:02:43,064 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 64 [2021-11-22 15:02:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:43,065 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-22 15:02:43,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-22 15:02:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 15:02:43,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:43,066 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-22 15:02:43,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:43,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:43,283 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2021-11-22 15:02:43,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:43,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028896313] [2021-11-22 15:02:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:43,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-22 15:02:43,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:43,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028896313] [2021-11-22 15:02:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028896313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901295714] [2021-11-22 15:02:43,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:02:43,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:43,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:43,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:43,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:02:43,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:02:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 15:02:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:43,545 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 15:02:43,545 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-22 15:02:43,549 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 [2021-11-22 15:02:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-22 15:02:44,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:02:44,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901295714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:44,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:02:44,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-22 15:02:44,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168894196] [2021-11-22 15:02:44,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:44,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 15:02:44,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 15:02:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:02:44,367 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-11-22 15:02:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:44,369 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-11-22 15:02:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:02:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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 75 [2021-11-22 15:02:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:44,371 INFO L225 Difference]: With dead ends: 111 [2021-11-22 15:02:44,371 INFO L226 Difference]: Without dead ends: 111 [2021-11-22 15:02:44,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:02:44,373 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-11-22 15:02:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-22 15:02:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-22 15:02:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2021-11-22 15:02:44,379 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2021-11-22 15:02:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:44,380 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2021-11-22 15:02:44,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 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) [2021-11-22 15:02:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2021-11-22 15:02:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 15:02:44,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:44,381 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:44,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:44,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:44,607 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2021-11-22 15:02:44,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520333571] [2021-11-22 15:02:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:44,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 15:02:44,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520333571] [2021-11-22 15:02:44,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520333571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454059152] [2021-11-22 15:02:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:44,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:44,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:44,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 15:02:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:02:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 15:02:45,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 15:02:45,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454059152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:45,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:45,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-22 15:02:45,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680163705] [2021-11-22 15:02:45,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:45,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:02:45,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:02:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:02:45,314 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:45,597 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-11-22 15:02:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 15:02:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 15:02:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:45,599 INFO L225 Difference]: With dead ends: 113 [2021-11-22 15:02:45,599 INFO L226 Difference]: Without dead ends: 113 [2021-11-22 15:02:45,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:02:45,600 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:45,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 49 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-22 15:02:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-11-22 15:02:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 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) [2021-11-22 15:02:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-11-22 15:02:45,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2021-11-22 15:02:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-11-22 15:02:45,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-11-22 15:02:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 15:02:45,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:45,608 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:02:45,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:45,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 15:02:45,827 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2021-11-22 15:02:45,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958377907] [2021-11-22 15:02:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:45,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-22 15:02:45,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958377907] [2021-11-22 15:02:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958377907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102188906] [2021-11-22 15:02:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:45,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:45,981 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:46,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 15:02:46,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-22 15:02:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:02:46,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-22 15:02:47,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:02:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102188906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:02:47,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:02:47,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-22 15:02:47,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242313623] [2021-11-22 15:02:47,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:02:47,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:02:47,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:02:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:02:47,048 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-11-22 15:02:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:47,064 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-11-22 15:02:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:02:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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 85 [2021-11-22 15:02:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:47,066 INFO L225 Difference]: With dead ends: 110 [2021-11-22 15:02:47,066 INFO L226 Difference]: Without dead ends: 94 [2021-11-22 15:02:47,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-22 15:02:47,068 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:47,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-22 15:02:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-22 15:02:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-22 15:02:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 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) [2021-11-22 15:02:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2021-11-22 15:02:47,073 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2021-11-22 15:02:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2021-11-22 15:02:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2021-11-22 15:02:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2021-11-22 15:02:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-22 15:02:47,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:47,075 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-22 15:02:47,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:47,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:47,291 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:47,292 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2021-11-22 15:02:47,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:47,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062107286] [2021-11-22 15:02:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:47,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 15:02:47,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062107286] [2021-11-22 15:02:47,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062107286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830856909] [2021-11-22 15:02:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:02:47,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:47,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:47,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 15:02:47,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:02:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 15:02:47,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:47,490 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:02:47,490 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:02:48,129 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 13 treesize of output 9 [2021-11-22 15:02:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-22 15:02:48,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-11-22 15:02:48,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830856909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:48,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:48,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-22 15:02:48,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556294092] [2021-11-22 15:02:48,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:48,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 15:02:48,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 15:02:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-22 15:02:48,587 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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) [2021-11-22 15:02:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:48,962 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-11-22 15:02:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:02:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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 91 [2021-11-22 15:02:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:48,964 INFO L225 Difference]: With dead ends: 117 [2021-11-22 15:02:48,964 INFO L226 Difference]: Without dead ends: 117 [2021-11-22 15:02:48,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:02:48,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 224 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:48,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 59 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-22 15:02:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2021-11-22 15:02:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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) [2021-11-22 15:02:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-22 15:02:48,971 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2021-11-22 15:02:48,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:48,972 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-22 15:02:48,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 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) [2021-11-22 15:02:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-22 15:02:48,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-22 15:02:48,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:48,973 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-22 15:02:49,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:49,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 15:02:49,192 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2021-11-22 15:02:49,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:49,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489785943] [2021-11-22 15:02:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:49,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 15:02:49,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489785943] [2021-11-22 15:02:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489785943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:49,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819265047] [2021-11-22 15:02:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:49,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:49,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:49,411 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:49,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 15:02:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 15:02:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:49,528 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:02:49,529 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:02:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 15:02:50,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-22 15:02:50,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819265047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:50,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:50,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-11-22 15:02:50,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64043848] [2021-11-22 15:02:50,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:50,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 15:02:50,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 15:02:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:02:50,918 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 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) [2021-11-22 15:02:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:51,405 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2021-11-22 15:02:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 15:02:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 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) Word has length 92 [2021-11-22 15:02:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:51,407 INFO L225 Difference]: With dead ends: 159 [2021-11-22 15:02:51,408 INFO L226 Difference]: Without dead ends: 159 [2021-11-22 15:02:51,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:02:51,410 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 214 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:51,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 67 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:02:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-22 15:02:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-11-22 15:02:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 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) [2021-11-22 15:02:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-11-22 15:02:51,419 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2021-11-22 15:02:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:51,419 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-11-22 15:02:51,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.222222222222222) internal successors, (94), 19 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) [2021-11-22 15:02:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-11-22 15:02:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-22 15:02:51,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:51,423 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2021-11-22 15:02:51,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 15:02:51,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:51,651 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:51,652 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2021-11-22 15:02:51,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:51,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686051338] [2021-11-22 15:02:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:51,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-22 15:02:51,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686051338] [2021-11-22 15:02:51,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686051338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913950708] [2021-11-22 15:02:51,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:02:51,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:51,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:51,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 15:02:51,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:02:51,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 15:02:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:02:53,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:53,569 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 [2021-11-22 15:02:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:02:55,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913950708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:55,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:55,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-11-22 15:02:55,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879592425] [2021-11-22 15:02:55,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:55,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:02:55,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:55,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:02:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 15:02:55,075 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:02:57,124 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-11-22 15:02:57,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-22 15:02:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 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 122 [2021-11-22 15:02:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:02:57,127 INFO L225 Difference]: With dead ends: 167 [2021-11-22 15:02:57,127 INFO L226 Difference]: Without dead ends: 167 [2021-11-22 15:02:57,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2021-11-22 15:02:57,131 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 292 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:02:57,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 111 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 15:02:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-22 15:02:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-11-22 15:02:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 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) [2021-11-22 15:02:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2021-11-22 15:02:57,139 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2021-11-22 15:02:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:02:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2021-11-22 15:02:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:02:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2021-11-22 15:02:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-22 15:02:57,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:02:57,143 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2021-11-22 15:02:57,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-22 15:02:57,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:57,363 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:02:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:02:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2021-11-22 15:02:57,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:02:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942008670] [2021-11-22 15:02:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:02:57,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:02:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:02:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 828 proven. 334 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-11-22 15:02:57,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:02:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942008670] [2021-11-22 15:02:57,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942008670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:02:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412545296] [2021-11-22 15:02:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:02:57,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:02:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:02:57,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:02:57,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 15:02:57,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 15:02:57,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:02:57,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 15:02:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:02:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-22 15:02:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:02:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-22 15:02:59,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412545296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:02:59,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:02:59,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2021-11-22 15:02:59,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041887734] [2021-11-22 15:02:59,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:02:59,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 15:02:59,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:02:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 15:02:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 15:02:59,082 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 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) [2021-11-22 15:03:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:00,436 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2021-11-22 15:03:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 15:03:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 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 149 [2021-11-22 15:03:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:00,439 INFO L225 Difference]: With dead ends: 161 [2021-11-22 15:03:00,439 INFO L226 Difference]: Without dead ends: 161 [2021-11-22 15:03:00,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=846, Invalid=3444, Unknown=0, NotChecked=0, Total=4290 [2021-11-22 15:03:00,442 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 445 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:00,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 97 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 15:03:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-22 15:03:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-11-22 15:03:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2021-11-22 15:03:00,449 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2021-11-22 15:03:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:00,449 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2021-11-22 15:03:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 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) [2021-11-22 15:03:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2021-11-22 15:03:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-22 15:03:00,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:00,453 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2021-11-22 15:03:00,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:00,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-22 15:03:00,670 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2021-11-22 15:03:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:00,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751264633] [2021-11-22 15:03:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:00,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-22 15:03:00,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751264633] [2021-11-22 15:03:00,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751264633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370967520] [2021-11-22 15:03:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:03:00,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:00,938 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:00,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 15:03:01,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:03:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 15:03:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-22 15:03:01,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-22 15:03:02,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370967520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:02,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:02,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2021-11-22 15:03:02,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414615218] [2021-11-22 15:03:02,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:02,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 15:03:02,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 15:03:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 15:03:02,453 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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) [2021-11-22 15:03:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:04,246 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2021-11-22 15:03:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-22 15:03:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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 154 [2021-11-22 15:03:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:04,250 INFO L225 Difference]: With dead ends: 401 [2021-11-22 15:03:04,250 INFO L226 Difference]: Without dead ends: 401 [2021-11-22 15:03:04,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2021-11-22 15:03:04,257 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 212 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:04,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 80 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:03:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-22 15:03:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2021-11-22 15:03:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2021-11-22 15:03:04,271 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2021-11-22 15:03:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:04,272 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2021-11-22 15:03:04,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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) [2021-11-22 15:03:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2021-11-22 15:03:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-22 15:03:04,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:04,279 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:04,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:04,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 15:03:04,500 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2021-11-22 15:03:04,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:04,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912703231] [2021-11-22 15:03:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:04,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3868 proven. 228 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2021-11-22 15:03:04,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912703231] [2021-11-22 15:03:04,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912703231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432033566] [2021-11-22 15:03:04,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:03:04,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:04,890 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:04,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 15:03:05,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-22 15:03:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 15:03:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2021-11-22 15:03:05,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3798 proven. 388 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2021-11-22 15:03:06,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432033566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:06,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 32 [2021-11-22 15:03:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337019445] [2021-11-22 15:03:06,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:06,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 15:03:06,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 15:03:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-22 15:03:06,807 INFO L87 Difference]: Start difference. First operand 390 states and 411 transitions. Second operand has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 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) [2021-11-22 15:03:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:07,928 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2021-11-22 15:03:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 15:03:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 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 314 [2021-11-22 15:03:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:07,932 INFO L225 Difference]: With dead ends: 390 [2021-11-22 15:03:07,932 INFO L226 Difference]: Without dead ends: 390 [2021-11-22 15:03:07,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=700, Invalid=2380, Unknown=0, NotChecked=0, Total=3080 [2021-11-22 15:03:07,935 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:07,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 87 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 15:03:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-22 15:03:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-22 15:03:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2021-11-22 15:03:07,948 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2021-11-22 15:03:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:07,949 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2021-11-22 15:03:07,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.21875) internal successors, (167), 32 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) [2021-11-22 15:03:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2021-11-22 15:03:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-22 15:03:07,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:07,957 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:08,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:08,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 15:03:08,171 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2021-11-22 15:03:08,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:08,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385401497] [2021-11-22 15:03:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:08,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4639 proven. 321 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2021-11-22 15:03:08,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385401497] [2021-11-22 15:03:08,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385401497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:08,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466080237] [2021-11-22 15:03:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:03:08,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:08,538 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:08,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 15:03:09,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-22 15:03:09,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 15:03:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2021-11-22 15:03:10,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5125 proven. 670 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2021-11-22 15:03:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466080237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:10,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:10,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 36 [2021-11-22 15:03:10,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172279187] [2021-11-22 15:03:10,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:10,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 15:03:10,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:10,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 15:03:10,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 15:03:10,937 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 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) [2021-11-22 15:03:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:12,494 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2021-11-22 15:03:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-22 15:03:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 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 339 [2021-11-22 15:03:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:12,498 INFO L225 Difference]: With dead ends: 390 [2021-11-22 15:03:12,498 INFO L226 Difference]: Without dead ends: 390 [2021-11-22 15:03:12,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=3559, Unknown=0, NotChecked=0, Total=4556 [2021-11-22 15:03:12,502 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:12,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 107 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 15:03:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-22 15:03:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-22 15:03:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2021-11-22 15:03:12,523 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2021-11-22 15:03:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:12,523 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2021-11-22 15:03:12,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 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) [2021-11-22 15:03:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2021-11-22 15:03:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-22 15:03:12,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:12,533 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:12,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:12,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 15:03:12,755 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2021-11-22 15:03:12,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499936566] [2021-11-22 15:03:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:12,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5350 proven. 429 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2021-11-22 15:03:13,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:13,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499936566] [2021-11-22 15:03:13,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499936566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:13,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389442801] [2021-11-22 15:03:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:03:13,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:13,179 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:13,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 15:03:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:13,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 15:03:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-11-22 15:03:14,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-11-22 15:03:15,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389442801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:15,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:15,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-11-22 15:03:15,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592581366] [2021-11-22 15:03:15,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:15,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 15:03:15,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 15:03:15,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 15:03:15,110 INFO L87 Difference]: Start difference. First operand 390 states and 400 transitions. Second operand has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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) [2021-11-22 15:03:16,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:16,958 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2021-11-22 15:03:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 15:03:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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 359 [2021-11-22 15:03:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:16,962 INFO L225 Difference]: With dead ends: 390 [2021-11-22 15:03:16,962 INFO L226 Difference]: Without dead ends: 390 [2021-11-22 15:03:16,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 705 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=4619, Unknown=0, NotChecked=0, Total=5700 [2021-11-22 15:03:16,966 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:16,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 113 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 15:03:16,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-22 15:03:16,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-22 15:03:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2021-11-22 15:03:16,979 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2021-11-22 15:03:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:16,980 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2021-11-22 15:03:16,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.424242424242424) internal successors, (212), 33 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) [2021-11-22 15:03:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2021-11-22 15:03:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-22 15:03:16,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:16,990 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:17,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:17,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:17,203 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2021-11-22 15:03:17,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582099534] [2021-11-22 15:03:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:17,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5971 proven. 552 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2021-11-22 15:03:17,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582099534] [2021-11-22 15:03:17,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582099534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:17,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088206858] [2021-11-22 15:03:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:03:17,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:17,647 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 15:03:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:03:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 15:03:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-11-22 15:03:18,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-11-22 15:03:19,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088206858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:19,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 37 [2021-11-22 15:03:19,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758789497] [2021-11-22 15:03:19,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:19,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 15:03:19,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 15:03:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 15:03:19,914 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:22,133 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2021-11-22 15:03:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-22 15:03:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-11-22 15:03:22,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:22,138 INFO L225 Difference]: With dead ends: 390 [2021-11-22 15:03:22,138 INFO L226 Difference]: Without dead ends: 390 [2021-11-22 15:03:22,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=6523, Unknown=0, NotChecked=0, Total=8010 [2021-11-22 15:03:22,143 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:22,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 155 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 15:03:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-22 15:03:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2021-11-22 15:03:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2021-11-22 15:03:22,155 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2021-11-22 15:03:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:22,157 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2021-11-22 15:03:22,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.45945945945946) internal successors, (239), 37 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2021-11-22 15:03:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-22 15:03:22,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:22,161 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:22,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:22,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:22,375 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:22,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2021-11-22 15:03:22,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:22,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335152873] [2021-11-22 15:03:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:22,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7073 proven. 2819 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2021-11-22 15:03:22,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335152873] [2021-11-22 15:03:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335152873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24425842] [2021-11-22 15:03:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:03:22,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:22,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:22,872 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:22,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 15:03:23,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 15:03:23,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 15:03:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:23,072 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:03:23,072 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:03:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2021-11-22 15:03:25,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2021-11-22 15:03:28,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24425842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:28,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:28,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-11-22 15:03:28,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669199810] [2021-11-22 15:03:28,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:28,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 15:03:28,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 15:03:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 15:03:28,335 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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) [2021-11-22 15:03:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:33,927 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2021-11-22 15:03:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-22 15:03:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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 384 [2021-11-22 15:03:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:33,932 INFO L225 Difference]: With dead ends: 522 [2021-11-22 15:03:33,932 INFO L226 Difference]: Without dead ends: 522 [2021-11-22 15:03:33,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6568 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5229, Invalid=18333, Unknown=0, NotChecked=0, Total=23562 [2021-11-22 15:03:33,941 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 735 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:33,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 212 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 15:03:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-22 15:03:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2021-11-22 15:03:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2021-11-22 15:03:33,957 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2021-11-22 15:03:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:33,958 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2021-11-22 15:03:33,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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) [2021-11-22 15:03:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2021-11-22 15:03:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-11-22 15:03:33,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:33,964 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2021-11-22 15:03:34,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:34,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:34,181 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2021-11-22 15:03:34,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:34,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540338858] [2021-11-22 15:03:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:34,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 417 proven. 13839 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2021-11-22 15:03:34,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:34,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540338858] [2021-11-22 15:03:34,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540338858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:34,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379907] [2021-11-22 15:03:34,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:03:34,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:34,847 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 15:03:35,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:03:35,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 15:03:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-11-22 15:03:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-11-22 15:03:39,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:39,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:39,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 35] total 70 [2021-11-22 15:03:39,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568693563] [2021-11-22 15:03:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:39,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-22 15:03:39,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-22 15:03:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 15:03:39,403 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:48,897 INFO L93 Difference]: Finished difference Result 1468 states and 1557 transitions. [2021-11-22 15:03:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2021-11-22 15:03:48,898 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 449 [2021-11-22 15:03:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:48,907 INFO L225 Difference]: With dead ends: 1468 [2021-11-22 15:03:48,907 INFO L226 Difference]: Without dead ends: 1468 [2021-11-22 15:03:48,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 852 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62622 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=34492, Invalid=81448, Unknown=0, NotChecked=0, Total=115940 [2021-11-22 15:03:48,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 609 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:48,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 204 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-22 15:03:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-11-22 15:03:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1457. [2021-11-22 15:03:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0618131868131868) internal successors, (1546), 1456 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1546 transitions. [2021-11-22 15:03:48,954 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1546 transitions. Word has length 449 [2021-11-22 15:03:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:48,955 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 1546 transitions. [2021-11-22 15:03:48,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1546 transitions. [2021-11-22 15:03:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2021-11-22 15:03:48,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:48,971 INFO L514 BasicCegarLoop]: trace histogram [187, 187, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2021-11-22 15:03:49,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:49,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-22 15:03:49,187 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:49,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1138886418, now seen corresponding path program 11 times [2021-11-22 15:03:49,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:49,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797490259] [2021-11-22 15:03:49,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:49,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:03:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 34448 proven. 843 refuted. 0 times theorem prover too weak. 56382 trivial. 0 not checked. [2021-11-22 15:03:50,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:03:50,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797490259] [2021-11-22 15:03:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797490259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:03:50,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331495807] [2021-11-22 15:03:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:03:50,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:03:50,444 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:03:50,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-22 15:03:51,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-22 15:03:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:03:51,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:03:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:03:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 48319 proven. 3482 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2021-11-22 15:03:53,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:03:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 49198 proven. 2603 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2021-11-22 15:03:55,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331495807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:03:55,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:03:55,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 54 [2021-11-22 15:03:55,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14559800] [2021-11-22 15:03:55,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:03:55,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-22 15:03:55,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:03:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-22 15:03:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 15:03:55,506 INFO L87 Difference]: Start difference. First operand 1457 states and 1546 transitions. Second operand has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:03:58,593 INFO L93 Difference]: Finished difference Result 1457 states and 1534 transitions. [2021-11-22 15:03:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-22 15:03:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1076 [2021-11-22 15:03:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:03:58,601 INFO L225 Difference]: With dead ends: 1457 [2021-11-22 15:03:58,602 INFO L226 Difference]: Without dead ends: 1457 [2021-11-22 15:03:58,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2245 GetRequests, 2124 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3890 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3070, Invalid=11936, Unknown=0, NotChecked=0, Total=15006 [2021-11-22 15:03:58,604 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:03:58,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 249 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 15:03:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-11-22 15:03:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2021-11-22 15:03:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0535714285714286) internal successors, (1534), 1456 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1534 transitions. [2021-11-22 15:03:58,643 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1534 transitions. Word has length 1076 [2021-11-22 15:03:58,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:03:58,644 INFO L470 AbstractCegarLoop]: Abstraction has 1457 states and 1534 transitions. [2021-11-22 15:03:58,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.518518518518518) internal successors, (298), 54 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:03:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1534 transitions. [2021-11-22 15:03:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2021-11-22 15:03:58,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:03:58,661 INFO L514 BasicCegarLoop]: trace histogram [198, 198, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2021-11-22 15:03:58,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-22 15:03:58,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:03:58,887 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:03:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:03:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275497, now seen corresponding path program 12 times [2021-11-22 15:03:58,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:03:58,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688604238] [2021-11-22 15:03:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:03:58,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:03:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38216 proven. 1011 refuted. 0 times theorem prover too weak. 63204 trivial. 0 not checked. [2021-11-22 15:04:00,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688604238] [2021-11-22 15:04:00,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688604238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691684857] [2021-11-22 15:04:00,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:04:00,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:00,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:00,103 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-22 15:04:00,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-22 15:04:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 15:04:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:00,688 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:04:00,688 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:04:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 9527 proven. 20565 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2021-11-22 15:04:07,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 0 proven. 30092 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2021-11-22 15:04:15,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691684857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:15,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:15,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 19] total 63 [2021-11-22 15:04:15,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805728922] [2021-11-22 15:04:15,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:15,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-22 15:04:15,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-22 15:04:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=3240, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 15:04:15,974 INFO L87 Difference]: Start difference. First operand 1457 states and 1534 transitions. Second operand has 63 states, 63 states have (on average 4.968253968253968) internal successors, (313), 63 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:29,381 INFO L93 Difference]: Finished difference Result 1665 states and 1746 transitions. [2021-11-22 15:04:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-11-22 15:04:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.968253968253968) internal successors, (313), 63 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1131 [2021-11-22 15:04:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:29,388 INFO L225 Difference]: With dead ends: 1665 [2021-11-22 15:04:29,388 INFO L226 Difference]: Without dead ends: 1665 [2021-11-22 15:04:29,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2468 GetRequests, 2228 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18798 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=9360, Invalid=48962, Unknown=0, NotChecked=0, Total=58322 [2021-11-22 15:04:29,391 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 2143 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:29,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 282 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 15:04:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-22 15:04:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1592. [2021-11-22 15:04:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0521684475172848) internal successors, (1674), 1591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1674 transitions. [2021-11-22 15:04:29,425 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1674 transitions. Word has length 1131 [2021-11-22 15:04:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:29,426 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1674 transitions. [2021-11-22 15:04:29,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.968253968253968) internal successors, (313), 63 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1674 transitions. [2021-11-22 15:04:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2021-11-22 15:04:29,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:29,445 INFO L514 BasicCegarLoop]: trace histogram [232, 232, 231, 231, 231, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:04:29,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:29,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-22 15:04:29,667 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:04:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash 738738834, now seen corresponding path program 13 times [2021-11-22 15:04:29,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:29,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420413869] [2021-11-22 15:04:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:29,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 64934 proven. 1194 refuted. 0 times theorem prover too weak. 73753 trivial. 0 not checked. [2021-11-22 15:04:30,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420413869] [2021-11-22 15:04:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420413869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062935985] [2021-11-22 15:04:30,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:04:30,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:30,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:30,994 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:30,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-22 15:04:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 3447 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:04:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2021-11-22 15:04:34,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2021-11-22 15:04:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062935985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:36,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:36,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 53 [2021-11-22 15:04:36,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707918656] [2021-11-22 15:04:36,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:36,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-22 15:04:36,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:36,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-22 15:04:36,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=2259, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 15:04:36,627 INFO L87 Difference]: Start difference. First operand 1592 states and 1674 transitions. Second operand has 53 states, 53 states have (on average 6.547169811320755) internal successors, (347), 53 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:42,152 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2021-11-22 15:04:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-22 15:04:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.547169811320755) internal successors, (347), 53 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1308 [2021-11-22 15:04:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:42,163 INFO L225 Difference]: With dead ends: 1592 [2021-11-22 15:04:42,163 INFO L226 Difference]: Without dead ends: 1592 [2021-11-22 15:04:42,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2593 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6499 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4276, Invalid=19904, Unknown=0, NotChecked=0, Total=24180 [2021-11-22 15:04:42,166 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 183 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 5620 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 5664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:42,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 188 Invalid, 5664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5620 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-22 15:04:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-11-22 15:04:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2021-11-22 15:04:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2021-11-22 15:04:42,203 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1308 [2021-11-22 15:04:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:42,204 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2021-11-22 15:04:42,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.547169811320755) internal successors, (347), 53 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2021-11-22 15:04:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2021-11-22 15:04:42,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:42,227 INFO L514 BasicCegarLoop]: trace histogram [241, 241, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:04:42,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:42,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-22 15:04:42,450 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:04:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1786428189, now seen corresponding path program 14 times [2021-11-22 15:04:42,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:42,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338176808] [2021-11-22 15:04:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:42,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 69661 proven. 1392 refuted. 0 times theorem prover too weak. 79619 trivial. 0 not checked. [2021-11-22 15:04:44,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338176808] [2021-11-22 15:04:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338176808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638981212] [2021-11-22 15:04:44,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:04:44,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:44,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:44,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-22 15:04:45,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:04:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:45,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 3555 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 15:04:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2021-11-22 15:04:48,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:04:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2021-11-22 15:04:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638981212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:04:50,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:04:50,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 57 [2021-11-22 15:04:50,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452626427] [2021-11-22 15:04:50,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:04:50,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-22 15:04:50,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:04:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-22 15:04:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=2622, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 15:04:50,580 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 57 states, 57 states have (on average 6.56140350877193) internal successors, (374), 57 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) [2021-11-22 15:04:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:04:56,946 INFO L93 Difference]: Finished difference Result 1674 states and 1735 transitions. [2021-11-22 15:04:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-22 15:04:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.56140350877193) internal successors, (374), 57 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 1353 [2021-11-22 15:04:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:04:56,955 INFO L225 Difference]: With dead ends: 1674 [2021-11-22 15:04:56,955 INFO L226 Difference]: Without dead ends: 1674 [2021-11-22 15:04:56,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2854 GetRequests, 2681 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8270 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5347, Invalid=25103, Unknown=0, NotChecked=0, Total=30450 [2021-11-22 15:04:56,958 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 6936 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 6983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 6936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:04:56,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 319 Invalid, 6983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 6936 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 15:04:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-11-22 15:04:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1664. [2021-11-22 15:04:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.0372820204449789) internal successors, (1725), 1663 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:04:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 1725 transitions. [2021-11-22 15:04:56,994 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 1725 transitions. Word has length 1353 [2021-11-22 15:04:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:04:56,996 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 1725 transitions. [2021-11-22 15:04:56,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.56140350877193) internal successors, (374), 57 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) [2021-11-22 15:04:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 1725 transitions. [2021-11-22 15:04:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2021-11-22 15:04:57,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:04:57,020 INFO L514 BasicCegarLoop]: trace histogram [249, 249, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:04:57,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-22 15:04:57,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-22 15:04:57,234 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:04:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:04:57,235 INFO L85 PathProgramCache]: Analyzing trace with hash -524826813, now seen corresponding path program 15 times [2021-11-22 15:04:57,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:04:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025853775] [2021-11-22 15:04:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:04:57,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:04:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:04:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 74157 proven. 1605 refuted. 0 times theorem prover too weak. 84842 trivial. 0 not checked. [2021-11-22 15:04:58,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:04:58,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025853775] [2021-11-22 15:04:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025853775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:04:58,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193693888] [2021-11-22 15:04:58,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:04:58,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:04:58,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:04:58,911 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:04:58,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-22 15:04:59,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-22 15:04:59,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:04:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 15:04:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:04:59,787 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:04:59,787 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:05:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2021-11-22 15:05:09,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2021-11-22 15:05:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193693888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:21,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:21,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 83 [2021-11-22 15:05:21,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144830688] [2021-11-22 15:05:21,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:21,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-22 15:05:21,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-22 15:05:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1305, Invalid=5501, Unknown=0, NotChecked=0, Total=6806 [2021-11-22 15:05:21,288 INFO L87 Difference]: Start difference. First operand 1664 states and 1725 transitions. Second operand has 83 states, 83 states have (on average 5.180722891566265) internal successors, (430), 83 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:05:28,210 INFO L93 Difference]: Finished difference Result 2063 states and 2130 transitions. [2021-11-22 15:05:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-22 15:05:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 5.180722891566265) internal successors, (430), 83 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1393 [2021-11-22 15:05:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:05:28,220 INFO L225 Difference]: With dead ends: 2063 [2021-11-22 15:05:28,220 INFO L226 Difference]: Without dead ends: 2063 [2021-11-22 15:05:28,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2920 GetRequests, 2737 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8357 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6610, Invalid=27430, Unknown=0, NotChecked=0, Total=34040 [2021-11-22 15:05:28,223 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1783 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:05:28,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 389 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 15:05:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-11-22 15:05:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1783. [2021-11-22 15:05:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0336700336700337) internal successors, (1842), 1782 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1842 transitions. [2021-11-22 15:05:28,260 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1842 transitions. Word has length 1393 [2021-11-22 15:05:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:05:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 1842 transitions. [2021-11-22 15:05:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 5.180722891566265) internal successors, (430), 83 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:05:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1842 transitions. [2021-11-22 15:05:28,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2021-11-22 15:05:28,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:05:28,288 INFO L514 BasicCegarLoop]: trace histogram [266, 266, 265, 265, 265, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:05:28,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-22 15:05:28,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 15:05:28,515 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:05:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:05:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash -950517878, now seen corresponding path program 16 times [2021-11-22 15:05:28,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:05:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272931983] [2021-11-22 15:05:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:05:28,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:05:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:05:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 89042 proven. 1833 refuted. 0 times theorem prover too weak. 91897 trivial. 0 not checked. [2021-11-22 15:05:30,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:05:30,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272931983] [2021-11-22 15:05:30,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272931983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:05:30,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46463676] [2021-11-22 15:05:30,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:05:30,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:05:30,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:05:30,460 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:05:30,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-22 15:05:48,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:05:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:05:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 3855 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 15:05:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:05:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2021-11-22 15:05:53,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:05:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2021-11-22 15:05:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46463676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:05:56,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:05:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 38] total 75 [2021-11-22 15:05:56,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382094147] [2021-11-22 15:05:56,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:05:56,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-22 15:05:56,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:05:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-22 15:05:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=4555, Unknown=0, NotChecked=0, Total=5550 [2021-11-22 15:05:56,591 INFO L87 Difference]: Start difference. First operand 1783 states and 1842 transitions. Second operand has 75 states, 75 states have (on average 7.32) internal successors, (549), 75 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:13,671 INFO L93 Difference]: Finished difference Result 2385 states and 2431 transitions. [2021-11-22 15:06:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2021-11-22 15:06:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 7.32) internal successors, (549), 75 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1478 [2021-11-22 15:06:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:13,686 INFO L225 Difference]: With dead ends: 2385 [2021-11-22 15:06:13,686 INFO L226 Difference]: Without dead ends: 2385 [2021-11-22 15:06:13,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3230 GetRequests, 2917 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28663 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18113, Invalid=80797, Unknown=0, NotChecked=0, Total=98910 [2021-11-22 15:06:13,696 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 241 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 15998 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 16062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 15998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:13,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 573 Invalid, 16062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 15998 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-11-22 15:06:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-11-22 15:06:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2375. [2021-11-22 15:06:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 1.0197978096040439) internal successors, (2421), 2374 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2421 transitions. [2021-11-22 15:06:13,741 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2421 transitions. Word has length 1478 [2021-11-22 15:06:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:13,742 INFO L470 AbstractCegarLoop]: Abstraction has 2375 states and 2421 transitions. [2021-11-22 15:06:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 7.32) internal successors, (549), 75 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2421 transitions. [2021-11-22 15:06:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2021-11-22 15:06:13,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:13,772 INFO L514 BasicCegarLoop]: trace histogram [277, 277, 276, 276, 276, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:06:13,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-22 15:06:13,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-22 15:06:13,994 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:06:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash -445226877, now seen corresponding path program 17 times [2021-11-22 15:06:13,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:13,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148828514] [2021-11-22 15:06:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:13,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 197886 backedges. 107661 proven. 2076 refuted. 0 times theorem prover too weak. 88149 trivial. 0 not checked. [2021-11-22 15:06:15,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148828514] [2021-11-22 15:06:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148828514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081031427] [2021-11-22 15:06:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:06:15,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:15,891 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:15,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-22 15:06:22,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-11-22 15:06:22,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 3320 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-22 15:06:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 197886 backedges. 140736 proven. 13643 refuted. 0 times theorem prover too weak. 43507 trivial. 0 not checked. [2021-11-22 15:06:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:06:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 197886 backedges. 143346 proven. 11033 refuted. 0 times theorem prover too weak. 43507 trivial. 0 not checked. [2021-11-22 15:06:29,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081031427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:06:29,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:06:29,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 78 [2021-11-22 15:06:29,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789033635] [2021-11-22 15:06:29,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:06:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-22 15:06:29,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:06:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-22 15:06:29,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=5004, Unknown=0, NotChecked=0, Total=6006 [2021-11-22 15:06:29,277 INFO L87 Difference]: Start difference. First operand 2375 states and 2421 transitions. Second operand has 78 states, 78 states have (on average 5.897435897435898) internal successors, (460), 78 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:06:39,265 INFO L93 Difference]: Finished difference Result 2472 states and 2510 transitions. [2021-11-22 15:06:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-11-22 15:06:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.897435897435898) internal successors, (460), 78 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1533 [2021-11-22 15:06:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:06:39,277 INFO L225 Difference]: With dead ends: 2472 [2021-11-22 15:06:39,277 INFO L226 Difference]: Without dead ends: 2472 [2021-11-22 15:06:39,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3264 GetRequests, 3026 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15653 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=10753, Invalid=46607, Unknown=0, NotChecked=0, Total=57360 [2021-11-22 15:06:39,283 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 294 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 10083 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 10156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 10083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:06:39,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 375 Invalid, 10156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 10083 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-22 15:06:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-11-22 15:06:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2462. [2021-11-22 15:06:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 1.0158472165786265) internal successors, (2500), 2461 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 2500 transitions. [2021-11-22 15:06:39,329 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 2500 transitions. Word has length 1533 [2021-11-22 15:06:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:06:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 2500 transitions. [2021-11-22 15:06:39,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.897435897435898) internal successors, (460), 78 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:06:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 2500 transitions. [2021-11-22 15:06:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1554 [2021-11-22 15:06:39,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:06:39,361 INFO L514 BasicCegarLoop]: trace histogram [281, 281, 280, 280, 280, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2021-11-22 15:06:39,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-22 15:06:39,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:39,575 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:06:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:06:39,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2011725613, now seen corresponding path program 18 times [2021-11-22 15:06:39,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:06:39,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112162890] [2021-11-22 15:06:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:06:39,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:06:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:06:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 111340 proven. 2334 refuted. 0 times theorem prover too weak. 89858 trivial. 0 not checked. [2021-11-22 15:06:41,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:06:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112162890] [2021-11-22 15:06:41,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112162890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:06:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178204101] [2021-11-22 15:06:41,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:06:41,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:06:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:06:41,415 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:06:41,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-22 15:06:47,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-22 15:06:47,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:06:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 2901 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-22 15:06:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:06:47,265 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 15:06:47,266 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-22 15:06:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 27725 proven. 42585 refuted. 0 times theorem prover too weak. 133222 trivial. 0 not checked. [2021-11-22 15:06:59,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 0 proven. 70310 refuted. 0 times theorem prover too weak. 133222 trivial. 0 not checked. [2021-11-22 15:07:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178204101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:07:12,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:07:12,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 32] total 101 [2021-11-22 15:07:12,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250267973] [2021-11-22 15:07:12,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:07:12,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-22 15:07:12,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:12,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-22 15:07:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1858, Invalid=8242, Unknown=0, NotChecked=0, Total=10100 [2021-11-22 15:07:12,936 INFO L87 Difference]: Start difference. First operand 2462 states and 2500 transitions. Second operand has 101 states, 101 states have (on average 4.99009900990099) internal successors, (504), 101 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:34,065 INFO L93 Difference]: Finished difference Result 3164 states and 3233 transitions. [2021-11-22 15:07:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-11-22 15:07:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 4.99009900990099) internal successors, (504), 101 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1553 [2021-11-22 15:07:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:34,076 INFO L225 Difference]: With dead ends: 3164 [2021-11-22 15:07:34,076 INFO L226 Difference]: Without dead ends: 3164 [2021-11-22 15:07:34,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3407 GetRequests, 3045 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41544 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=21846, Invalid=110286, Unknown=0, NotChecked=0, Total=132132 [2021-11-22 15:07:34,081 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4519 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 4099 mSolverCounterSat, 1046 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4519 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 5145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1046 IncrementalHoareTripleChecker+Valid, 4099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:34,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4519 Valid, 537 Invalid, 5145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1046 Valid, 4099 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-22 15:07:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-11-22 15:07:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2858. [2021-11-22 15:07:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 1.0178508925446272) internal successors, (2908), 2857 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 2908 transitions. [2021-11-22 15:07:34,121 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 2908 transitions. Word has length 1553 [2021-11-22 15:07:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:34,122 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 2908 transitions. [2021-11-22 15:07:34,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 4.99009900990099) internal successors, (504), 101 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 2908 transitions. [2021-11-22 15:07:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1873 [2021-11-22 15:07:34,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:34,155 INFO L514 BasicCegarLoop]: trace histogram [342, 342, 341, 341, 341, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2021-11-22 15:07:34,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-22 15:07:34,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:34,371 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:07:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1440274970, now seen corresponding path program 19 times [2021-11-22 15:07:34,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449243810] [2021-11-22 15:07:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:34,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 300533 backedges. 176002 proven. 2607 refuted. 0 times theorem prover too weak. 121924 trivial. 0 not checked. [2021-11-22 15:07:36,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:36,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449243810] [2021-11-22 15:07:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449243810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:07:36,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241989417] [2021-11-22 15:07:36,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:07:36,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:36,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:36,568 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:36,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-22 15:07:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 4827 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-22 15:07:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:07:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 300533 backedges. 219473 proven. 16576 refuted. 0 times theorem prover too weak. 64484 trivial. 0 not checked. [2021-11-22 15:07:40,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:07:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 300533 backedges. 219473 proven. 16576 refuted. 0 times theorem prover too weak. 64484 trivial. 0 not checked. [2021-11-22 15:07:43,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241989417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:07:43,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:07:43,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 77 [2021-11-22 15:07:43,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403281142] [2021-11-22 15:07:43,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:07:43,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-22 15:07:43,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:07:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-22 15:07:43,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=4842, Unknown=0, NotChecked=0, Total=5852 [2021-11-22 15:07:43,741 INFO L87 Difference]: Start difference. First operand 2858 states and 2908 transitions. Second operand has 77 states, 77 states have (on average 6.6103896103896105) internal successors, (509), 77 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:07:54,963 INFO L93 Difference]: Finished difference Result 2965 states and 3011 transitions. [2021-11-22 15:07:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-11-22 15:07:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 6.6103896103896105) internal successors, (509), 77 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1872 [2021-11-22 15:07:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:07:54,974 INFO L225 Difference]: With dead ends: 2965 [2021-11-22 15:07:54,974 INFO L226 Difference]: Without dead ends: 2965 [2021-11-22 15:07:54,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3992 GetRequests, 3709 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22761 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=13907, Invalid=67033, Unknown=0, NotChecked=0, Total=80940 [2021-11-22 15:07:54,979 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 259 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 11803 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 11867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:07:54,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 468 Invalid, 11867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 11803 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-22 15:07:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-22 15:07:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2955. [2021-11-22 15:07:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.0159106296547056) internal successors, (3001), 2954 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3001 transitions. [2021-11-22 15:07:55,014 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3001 transitions. Word has length 1872 [2021-11-22 15:07:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:07:55,015 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 3001 transitions. [2021-11-22 15:07:55,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 6.6103896103896105) internal successors, (509), 77 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:07:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3001 transitions. [2021-11-22 15:07:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1883 [2021-11-22 15:07:55,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:07:55,047 INFO L514 BasicCegarLoop]: trace histogram [344, 344, 343, 343, 343, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2021-11-22 15:07:55,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-22 15:07:55,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-22 15:07:55,275 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:07:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:07:55,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1136406914, now seen corresponding path program 20 times [2021-11-22 15:07:55,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:07:55,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314437004] [2021-11-22 15:07:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:07:55,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:07:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:07:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 230282 proven. 21589 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2021-11-22 15:07:57,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:07:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314437004] [2021-11-22 15:07:57,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314437004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:07:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314371222] [2021-11-22 15:07:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:07:57,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:07:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:07:57,133 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:07:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-22 15:07:57,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:07:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:07:57,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 4851 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-22 15:07:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2021-11-22 15:08:01,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2021-11-22 15:08:03,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314371222] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:03,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:03,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 63 [2021-11-22 15:08:03,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959184749] [2021-11-22 15:08:03,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:03,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-22 15:08:03,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-22 15:08:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=2981, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 15:08:03,971 INFO L87 Difference]: Start difference. First operand 2955 states and 3001 transitions. Second operand has 63 states, 63 states have (on average 7.0476190476190474) internal successors, (444), 63 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:09,774 INFO L93 Difference]: Finished difference Result 2955 states and 3000 transitions. [2021-11-22 15:08:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2021-11-22 15:08:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 7.0476190476190474) internal successors, (444), 63 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1882 [2021-11-22 15:08:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:09,786 INFO L225 Difference]: With dead ends: 2955 [2021-11-22 15:08:09,786 INFO L226 Difference]: Without dead ends: 2955 [2021-11-22 15:08:09,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4013 GetRequests, 3742 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25234 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=21169, Invalid=53087, Unknown=0, NotChecked=0, Total=74256 [2021-11-22 15:08:09,791 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 194 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:09,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 599 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2820 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-22 15:08:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-11-22 15:08:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2955. [2021-11-22 15:08:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.015572105619499) internal successors, (3000), 2954 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3000 transitions. [2021-11-22 15:08:09,838 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3000 transitions. Word has length 1882 [2021-11-22 15:08:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:09,839 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 3000 transitions. [2021-11-22 15:08:09,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 7.0476190476190474) internal successors, (444), 63 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3000 transitions. [2021-11-22 15:08:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2021-11-22 15:08:09,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:09,890 INFO L514 BasicCegarLoop]: trace histogram [345, 345, 344, 344, 344, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2021-11-22 15:08:09,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:10,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:10,115 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:08:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -87602005, now seen corresponding path program 21 times [2021-11-22 15:08:10,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424546679] [2021-11-22 15:08:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:10,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 119020 proven. 158286 refuted. 0 times theorem prover too weak. 28435 trivial. 0 not checked. [2021-11-22 15:08:12,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:12,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424546679] [2021-11-22 15:08:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424546679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:12,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186920747] [2021-11-22 15:08:12,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:08:12,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:12,684 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-22 15:08:17,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-11-22 15:08:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:08:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 15:08:17,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:08:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 154133 proven. 51535 refuted. 0 times theorem prover too weak. 100073 trivial. 0 not checked. [2021-11-22 15:08:22,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:08:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 153216 proven. 52452 refuted. 0 times theorem prover too weak. 100073 trivial. 0 not checked. [2021-11-22 15:08:26,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186920747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:08:26,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:08:26,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 56, 56] total 122 [2021-11-22 15:08:26,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688987285] [2021-11-22 15:08:26,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:08:26,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-22 15:08:26,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:08:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-22 15:08:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2595, Invalid=12167, Unknown=0, NotChecked=0, Total=14762 [2021-11-22 15:08:26,259 INFO L87 Difference]: Start difference. First operand 2955 states and 3000 transitions. Second operand has 122 states, 122 states have (on average 6.319672131147541) internal successors, (771), 122 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:08:41,081 INFO L93 Difference]: Finished difference Result 2452 states and 2496 transitions. [2021-11-22 15:08:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2021-11-22 15:08:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 6.319672131147541) internal successors, (771), 122 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1887 [2021-11-22 15:08:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:08:41,094 INFO L225 Difference]: With dead ends: 2452 [2021-11-22 15:08:41,094 INFO L226 Difference]: Without dead ends: 2452 [2021-11-22 15:08:41,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4212 GetRequests, 3697 SyntacticMatches, 2 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92174 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=32835, Invalid=231875, Unknown=0, NotChecked=0, Total=264710 [2021-11-22 15:08:41,105 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 5670 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 5607 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5670 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 5607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:08:41,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5670 Valid, 465 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 5607 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-22 15:08:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-11-22 15:08:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2386. [2021-11-22 15:08:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 1.0188679245283019) internal successors, (2430), 2385 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2430 transitions. [2021-11-22 15:08:41,135 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2430 transitions. Word has length 1887 [2021-11-22 15:08:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:08:41,137 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 2430 transitions. [2021-11-22 15:08:41,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 6.319672131147541) internal successors, (771), 122 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:08:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2430 transitions. [2021-11-22 15:08:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2224 [2021-11-22 15:08:41,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:08:41,178 INFO L514 BasicCegarLoop]: trace histogram [408, 408, 407, 407, 407, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1] [2021-11-22 15:08:41,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-22 15:08:41,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:41,378 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:08:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:08:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2119682071, now seen corresponding path program 22 times [2021-11-22 15:08:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:08:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174887783] [2021-11-22 15:08:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:08:41,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:08:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:08:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 427235 backedges. 227151 proven. 3516 refuted. 0 times theorem prover too weak. 196568 trivial. 0 not checked. [2021-11-22 15:08:44,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:08:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174887783] [2021-11-22 15:08:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174887783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:08:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997847274] [2021-11-22 15:08:44,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:08:44,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:08:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:08:44,546 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:08:44,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-22 15:09:00,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:09:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:09:00,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 5709 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-22 15:09:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:09:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 427235 backedges. 3326 proven. 407204 refuted. 0 times theorem prover too weak. 16705 trivial. 0 not checked. [2021-11-22 15:09:07,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:09:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 427235 backedges. 3326 proven. 407204 refuted. 0 times theorem prover too weak. 16705 trivial. 0 not checked. [2021-11-22 15:09:12,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997847274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:09:12,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:09:12,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 62, 62] total 144 [2021-11-22 15:09:12,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831998685] [2021-11-22 15:09:12,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:09:12,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-11-22 15:09:12,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:09:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-11-22 15:09:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=17681, Unknown=0, NotChecked=0, Total=20592 [2021-11-22 15:09:12,788 INFO L87 Difference]: Start difference. First operand 2386 states and 2430 transitions. Second operand has 144 states, 144 states have (on average 6.472222222222222) internal successors, (932), 144 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:10:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:10:07,470 INFO L93 Difference]: Finished difference Result 5599 states and 5778 transitions. [2021-11-22 15:10:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 918 states. [2021-11-22 15:10:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 6.472222222222222) internal successors, (932), 144 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2223 [2021-11-22 15:10:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:10:07,486 INFO L225 Difference]: With dead ends: 5599 [2021-11-22 15:10:07,486 INFO L226 Difference]: Without dead ends: 5599 [2021-11-22 15:10:07,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5407 GetRequests, 4349 SyntacticMatches, 1 SemanticMatches, 1057 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476662 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=96848, Invalid=1023574, Unknown=0, NotChecked=0, Total=1120422 [2021-11-22 15:10:07,551 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 5292 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 11458 mSolverCounterSat, 1880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5292 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 13338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1880 IncrementalHoareTripleChecker+Valid, 11458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-22 15:10:07,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5292 Valid, 807 Invalid, 13338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1880 Valid, 11458 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2021-11-22 15:10:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-11-22 15:10:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 3946. [2021-11-22 15:10:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 1.02915082382763) internal successors, (4060), 3945 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:10:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4060 transitions. [2021-11-22 15:10:07,595 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4060 transitions. Word has length 2223 [2021-11-22 15:10:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:10:07,596 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 4060 transitions. [2021-11-22 15:10:07,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 6.472222222222222) internal successors, (932), 144 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:10:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4060 transitions. [2021-11-22 15:10:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2824 [2021-11-22 15:10:07,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:10:07,826 INFO L514 BasicCegarLoop]: trace histogram [521, 521, 520, 520, 520, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-22 15:10:07,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-22 15:10:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-22 15:10:08,039 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:10:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:10:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1414733781, now seen corresponding path program 23 times [2021-11-22 15:10:08,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:10:08,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525993491] [2021-11-22 15:10:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:10:08,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:10:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:10:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 695697 backedges. 320499 proven. 3849 refuted. 0 times theorem prover too weak. 371349 trivial. 0 not checked. [2021-11-22 15:10:12,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:10:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525993491] [2021-11-22 15:10:12,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525993491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:10:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764848195] [2021-11-22 15:10:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:10:12,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:10:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:10:12,274 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:10:12,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-22 15:10:30,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-11-22 15:10:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:10:30,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 4562 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-22 15:10:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:10:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 695697 backedges. 498146 proven. 34140 refuted. 0 times theorem prover too weak. 163411 trivial. 0 not checked. [2021-11-22 15:10:37,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:10:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 695697 backedges. 504291 proven. 27995 refuted. 0 times theorem prover too weak. 163411 trivial. 0 not checked. [2021-11-22 15:10:42,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764848195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:10:42,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:10:42,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 103 [2021-11-22 15:10:42,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012285114] [2021-11-22 15:10:42,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:10:42,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-22 15:10:42,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:10:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-22 15:10:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=8787, Unknown=0, NotChecked=0, Total=10506 [2021-11-22 15:10:42,560 INFO L87 Difference]: Start difference. First operand 3946 states and 4060 transitions. Second operand has 103 states, 103 states have (on average 6.019417475728155) internal successors, (620), 103 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:11:04,147 INFO L93 Difference]: Finished difference Result 3946 states and 4043 transitions. [2021-11-22 15:11:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2021-11-22 15:11:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 6.019417475728155) internal successors, (620), 103 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2823 [2021-11-22 15:11:04,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:11:04,155 INFO L225 Difference]: With dead ends: 3946 [2021-11-22 15:11:04,156 INFO L226 Difference]: Without dead ends: 3946 [2021-11-22 15:11:04,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5981 GetRequests, 5593 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42832 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=27312, Invalid=124398, Unknown=0, NotChecked=0, Total=151710 [2021-11-22 15:11:04,165 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 380 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 20638 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 20717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 20638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-22 15:11:04,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 566 Invalid, 20717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 20638 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-22 15:11:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2021-11-22 15:11:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 3946. [2021-11-22 15:11:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 1.0248415716096324) internal successors, (4043), 3945 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4043 transitions. [2021-11-22 15:11:04,200 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4043 transitions. Word has length 2823 [2021-11-22 15:11:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:11:04,201 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 4043 transitions. [2021-11-22 15:11:04,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 6.019417475728155) internal successors, (620), 103 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:11:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4043 transitions. [2021-11-22 15:11:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2859 [2021-11-22 15:11:04,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:11:04,318 INFO L514 BasicCegarLoop]: trace histogram [528, 528, 527, 527, 527, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-22 15:11:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-22 15:11:04,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:04,518 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:11:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:11:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -187793902, now seen corresponding path program 24 times [2021-11-22 15:11:04,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:11:04,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55154856] [2021-11-22 15:11:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:11:04,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:11:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:11:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 329464 proven. 4197 refuted. 0 times theorem prover too weak. 380579 trivial. 0 not checked. [2021-11-22 15:11:08,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:11:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55154856] [2021-11-22 15:11:08,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55154856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:11:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93512323] [2021-11-22 15:11:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:11:08,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:11:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:11:08,048 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:11:08,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-22 15:12:00,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 77 check-sat command(s) [2021-11-22 15:12:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:12:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 4665 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-22 15:12:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:12:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 210918 proven. 17515 refuted. 0 times theorem prover too weak. 485807 trivial. 0 not checked. [2021-11-22 15:12:07,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:12:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 714240 backedges. 211956 proven. 5457 refuted. 0 times theorem prover too weak. 496827 trivial. 0 not checked. [2021-11-22 15:12:14,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93512323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:12:14,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:12:14,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 68, 62] total 177 [2021-11-22 15:12:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983750074] [2021-11-22 15:12:14,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:12:14,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2021-11-22 15:12:14,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2021-11-22 15:12:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=27122, Unknown=0, NotChecked=0, Total=31152 [2021-11-22 15:12:14,634 INFO L87 Difference]: Start difference. First operand 3946 states and 4043 transitions. Second operand has 177 states, 177 states have (on average 4.915254237288136) internal successors, (870), 177 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:12:30,944 INFO L93 Difference]: Finished difference Result 6767 states and 6894 transitions. [2021-11-22 15:12:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2021-11-22 15:12:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 4.915254237288136) internal successors, (870), 177 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2858 [2021-11-22 15:12:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:12:30,953 INFO L225 Difference]: With dead ends: 6767 [2021-11-22 15:12:30,953 INFO L226 Difference]: Without dead ends: 6767 [2021-11-22 15:12:30,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6035 GetRequests, 5591 SyntacticMatches, 0 SemanticMatches, 444 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57761 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=28592, Invalid=169878, Unknown=0, NotChecked=0, Total=198470 [2021-11-22 15:12:30,963 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 4994 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 9603 mSolverCounterSat, 1373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4994 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 10976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1373 IncrementalHoareTripleChecker+Valid, 9603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:12:30,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4994 Valid, 1038 Invalid, 10976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1373 Valid, 9603 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-22 15:12:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2021-11-22 15:12:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 4566. [2021-11-22 15:12:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4565 states have (on average 1.0175246440306682) internal successors, (4645), 4565 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 4645 transitions. [2021-11-22 15:12:31,004 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 4645 transitions. Word has length 2858 [2021-11-22 15:12:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:12:31,005 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 4645 transitions. [2021-11-22 15:12:31,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 4.915254237288136) internal successors, (870), 177 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:12:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 4645 transitions. [2021-11-22 15:12:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2939 [2021-11-22 15:12:31,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:12:31,061 INFO L514 BasicCegarLoop]: trace histogram [544, 544, 543, 543, 543, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-22 15:12:31,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-22 15:12:31,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:12:31,275 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:12:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:12:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1792437434, now seen corresponding path program 25 times [2021-11-22 15:12:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:12:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212489102] [2021-11-22 15:12:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:12:31,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:12:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 757544 backedges. 402844 proven. 17748 refuted. 0 times theorem prover too weak. 336952 trivial. 0 not checked. [2021-11-22 15:12:35,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:12:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212489102] [2021-11-22 15:12:35,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212489102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:12:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480184271] [2021-11-22 15:12:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:12:35,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:12:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:12:35,358 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:12:35,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-22 15:12:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:12:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 7491 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-22 15:12:36,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:12:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 757544 backedges. 584741 proven. 38158 refuted. 0 times theorem prover too weak. 134645 trivial. 0 not checked. [2021-11-22 15:12:42,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:12:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 757544 backedges. 584741 proven. 38158 refuted. 0 times theorem prover too weak. 134645 trivial. 0 not checked. [2021-11-22 15:12:46,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480184271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:12:46,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:12:46,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 51, 51] total 104 [2021-11-22 15:12:46,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163485148] [2021-11-22 15:12:46,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:12:46,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-22 15:12:46,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:12:46,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-22 15:12:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1784, Invalid=8928, Unknown=0, NotChecked=0, Total=10712 [2021-11-22 15:12:46,824 INFO L87 Difference]: Start difference. First operand 4566 states and 4645 transitions. Second operand has 104 states, 104 states have (on average 6.730769230769231) internal successors, (700), 104 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:13:21,216 INFO L93 Difference]: Finished difference Result 3348 states and 3379 transitions. [2021-11-22 15:13:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2021-11-22 15:13:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 6.730769230769231) internal successors, (700), 104 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2938 [2021-11-22 15:13:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:13:21,224 INFO L225 Difference]: With dead ends: 3348 [2021-11-22 15:13:21,225 INFO L226 Difference]: Without dead ends: 3348 [2021-11-22 15:13:21,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6335 GetRequests, 5830 SyntacticMatches, 0 SemanticMatches, 505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73581 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=44694, Invalid=211848, Unknown=0, NotChecked=0, Total=256542 [2021-11-22 15:13:21,247 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 343 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 25828 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 25909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 25828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-22 15:13:21,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 620 Invalid, 25909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 25828 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-22 15:13:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-22 15:13:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 3348. [2021-11-22 15:13:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 1.00956080071706) internal successors, (3379), 3347 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 3379 transitions. [2021-11-22 15:13:21,299 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 3379 transitions. Word has length 2938 [2021-11-22 15:13:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:13:21,302 INFO L470 AbstractCegarLoop]: Abstraction has 3348 states and 3379 transitions. [2021-11-22 15:13:21,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 6.730769230769231) internal successors, (700), 104 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:13:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 3379 transitions. [2021-11-22 15:13:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2989 [2021-11-22 15:13:21,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:13:21,436 INFO L514 BasicCegarLoop]: trace histogram [554, 554, 553, 553, 553, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1] [2021-11-22 15:13:21,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-22 15:13:21,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-22 15:13:21,652 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-22 15:13:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:13:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -956534366, now seen corresponding path program 26 times [2021-11-22 15:13:21,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:13:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371404919] [2021-11-22 15:13:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:13:21,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:13:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:13:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 785259 backedges. 336277 proven. 5739 refuted. 0 times theorem prover too weak. 443243 trivial. 0 not checked. [2021-11-22 15:13:25,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:13:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371404919] [2021-11-22 15:13:25,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371404919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:13:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357552954] [2021-11-22 15:13:25,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:13:25,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:13:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:13:25,454 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:13:25,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee879e2-04b6-4856-bd5a-e230be5b4f60/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-22 15:13:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:13:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:13:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 7611 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 15:13:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:13:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 785259 backedges. 658477 proven. 53782 refuted. 0 times theorem prover too weak. 73000 trivial. 0 not checked. [2021-11-22 15:13:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates...