./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:23:25,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:23:25,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:23:25,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:23:25,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:23:25,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:23:25,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:23:25,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:23:25,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:23:25,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:23:25,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:23:25,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:23:25,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:23:25,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:23:25,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:23:25,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:23:25,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:23:25,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:23:25,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:23:25,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:23:25,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:23:25,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:23:25,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:23:25,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:23:25,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:23:25,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:23:25,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:23:25,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:23:25,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:23:25,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:23:25,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:23:25,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:23:25,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:23:25,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:23:25,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:23:25,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:23:25,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:23:25,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:23:25,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:23:25,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:23:25,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:23:25,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:23:25,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:23:25,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:23:25,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:23:25,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:23:25,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:23:25,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:23:25,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:23:25,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:23:25,855 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:23:25,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:23:25,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:23:25,857 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:23:25,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:23:25,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:23:25,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:23:25,858 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:23:25,858 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:23:25,858 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:23:25,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:23:25,859 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:23:25,859 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:23:25,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:23:25,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:23:25,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:23:25,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:23:25,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:23:25,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:23:25,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:23:25,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:23:25,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:23:25,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:23:25,864 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_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2021-11-20 06:23:26,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:23:26,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:23:26,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:23:26,206 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:23:26,206 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:23:26,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-11-20 06:23:26,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/data/12d533c8b/310a5422eb274901984342640fb007f7/FLAGc671104a0 [2021-11-20 06:23:26,951 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:23:26,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2021-11-20 06:23:26,985 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/data/12d533c8b/310a5422eb274901984342640fb007f7/FLAGc671104a0 [2021-11-20 06:23:27,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/data/12d533c8b/310a5422eb274901984342640fb007f7 [2021-11-20 06:23:27,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:23:27,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:23:27,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:23:27,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:23:27,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:23:27,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c49d5b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27, skipping insertion in model container [2021-11-20 06:23:27,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:23:27,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:23:27,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:23:27,789 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:23:27,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:23:27,903 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:23:27,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27 WrapperNode [2021-11-20 06:23:27,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:23:27,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:23:27,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:23:27,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:23:27,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,960 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-11-20 06:23:27,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:23:27,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:23:27,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:23:27,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:23:27,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:27,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:23:27,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:23:27,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:23:27,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:23:27,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (1/1) ... [2021-11-20 06:23:28,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:23:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:28,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:23:28,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:23:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:23:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:23:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:23:28,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:23:28,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:23:28,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:23:28,215 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:23:28,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:23:28,584 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:23:28,591 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:23:28,591 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:23:28,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:23:28 BoogieIcfgContainer [2021-11-20 06:23:28,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:23:28,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:23:28,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:23:28,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:23:28,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:23:27" (1/3) ... [2021-11-20 06:23:28,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4297f5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:23:28, skipping insertion in model container [2021-11-20 06:23:28,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:23:27" (2/3) ... [2021-11-20 06:23:28,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4297f5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:23:28, skipping insertion in model container [2021-11-20 06:23:28,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:23:28" (3/3) ... [2021-11-20 06:23:28,614 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2021-11-20 06:23:28,621 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:23:28,621 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-20 06:23:28,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:23:28,672 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:23:28,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-20 06:23:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 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) [2021-11-20 06:23:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:23:28,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:28,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:28,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031117, now seen corresponding path program 1 times [2021-11-20 06:23:28,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:28,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065131107] [2021-11-20 06:23:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:28,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:28,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065131107] [2021-11-20 06:23:28,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065131107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:28,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:28,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:23:28,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919050663] [2021-11-20 06:23:28,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:28,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:23:28,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:29,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:23:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:29,026 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 2.0) internal successors, (66), 52 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) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:29,125 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-20 06:23:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:23:29,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 06:23:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:29,141 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:23:29,141 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 06:23:29,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:29,151 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:29,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 06:23:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-20 06:23:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.84375) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-20 06:23:29,205 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-11-20 06:23:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:29,206 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-20 06:23:29,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-20 06:23:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:23:29,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:29,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:29,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:23:29,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-11-20 06:23:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:29,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744427701] [2021-11-20 06:23:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:29,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:29,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:29,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744427701] [2021-11-20 06:23:29,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744427701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:29,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:29,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:23:29,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117602463] [2021-11-20 06:23:29,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:29,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:29,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:29,358 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:29,480 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-20 06:23:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:23:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:29,484 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:23:29,484 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 06:23:29,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:29,494 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:29,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 06:23:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-20 06:23:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.8125) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-11-20 06:23:29,508 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 8 [2021-11-20 06:23:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:29,509 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-11-20 06:23:29,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-11-20 06:23:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:23:29,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:29,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:29,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:23:29,511 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-11-20 06:23:29,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469175926] [2021-11-20 06:23:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:29,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:29,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:29,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469175926] [2021-11-20 06:23:29,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469175926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:29,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:23:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225750783] [2021-11-20 06:23:29,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:29,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:23:29,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:23:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:29,677 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:29,751 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-20 06:23:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:23:29,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:23:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:29,755 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:23:29,755 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 06:23:29,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:29,763 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:29,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 06:23:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 06:23:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.75) 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) [2021-11-20 06:23:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-11-20 06:23:29,778 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 8 [2021-11-20 06:23:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:29,778 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-11-20 06:23:29,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-11-20 06:23:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:23:29,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:29,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:29,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:23:29,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:29,784 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2021-11-20 06:23:29,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:29,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387761019] [2021-11-20 06:23:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:29,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:29,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387761019] [2021-11-20 06:23:29,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387761019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:29,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:29,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:23:29,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461168748] [2021-11-20 06:23:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:29,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:29,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:29,916 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,066 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2021-11-20 06:23:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:23:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,073 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:23:30,073 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 06:23:30,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:23:30,084 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 06:23:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-11-20 06:23:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-20 06:23:30,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 8 [2021-11-20 06:23:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,102 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-20 06:23:30,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-20 06:23:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:23:30,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:23:30,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2021-11-20 06:23:30,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711675596] [2021-11-20 06:23:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:30,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:30,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711675596] [2021-11-20 06:23:30,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711675596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:30,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:30,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:23:30,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259552539] [2021-11-20 06:23:30,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:30,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:30,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:30,239 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,307 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-20 06:23:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:23:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,309 INFO L225 Difference]: With dead ends: 50 [2021-11-20 06:23:30,309 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:23:30,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:23:30,311 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 37 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:23:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-20 06:23:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-20 06:23:30,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 10 [2021-11-20 06:23:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,318 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-20 06:23:30,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-20 06:23:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:23:30,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:23:30,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2021-11-20 06:23:30,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615093474] [2021-11-20 06:23:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:30,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615093474] [2021-11-20 06:23:30,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615093474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:30,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:30,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:23:30,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654793569] [2021-11-20 06:23:30,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:30,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:23:30,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:23:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:30,371 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,402 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-11-20 06:23:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:23:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:23:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,404 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:23:30,404 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 06:23:30,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:30,405 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 06:23:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-11-20 06:23:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-11-20 06:23:30,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2021-11-20 06:23:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,415 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-11-20 06:23:30,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-11-20 06:23:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:23:30,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:23:30,417 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2021-11-20 06:23:30,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199931288] [2021-11-20 06:23:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:30,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:30,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199931288] [2021-11-20 06:23:30,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199931288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:30,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:30,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:23:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252344212] [2021-11-20 06:23:30,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:30,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:23:30,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:30,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:23:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:30,458 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,491 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-11-20 06:23:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:23:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:23:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,493 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:23:30,493 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:23:30,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:23:30,495 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:23:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 06:23:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-20 06:23:30,501 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-11-20 06:23:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,502 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-20 06:23:30,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-20 06:23:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:23:30,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,503 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:23:30,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240800, now seen corresponding path program 1 times [2021-11-20 06:23:30,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200629434] [2021-11-20 06:23:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:30,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:30,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200629434] [2021-11-20 06:23:30,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200629434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:30,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:30,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:23:30,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137034797] [2021-11-20 06:23:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:30,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:30,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:30,564 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,653 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2021-11-20 06:23:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:23:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:23:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,656 INFO L225 Difference]: With dead ends: 125 [2021-11-20 06:23:30,656 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 06:23:30,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:30,658 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 157 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 06:23:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2021-11-20 06:23:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-20 06:23:30,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-11-20 06:23:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,705 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-20 06:23:30,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-20 06:23:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:23:30,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:23:30,709 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 613202235, now seen corresponding path program 1 times [2021-11-20 06:23:30,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506058921] [2021-11-20 06:23:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:30,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:30,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506058921] [2021-11-20 06:23:30,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506058921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:30,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:30,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:23:30,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597321997] [2021-11-20 06:23:30,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:30,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:23:30,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:23:30,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:30,806 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:30,841 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-20 06:23:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:23:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:23:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:30,842 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:23:30,842 INFO L226 Difference]: Without dead ends: 57 [2021-11-20 06:23:30,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:30,845 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:30,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-20 06:23:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-20 06:23:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-11-20 06:23:30,852 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 11 [2021-11-20 06:23:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:30,852 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-11-20 06:23:30,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-11-20 06:23:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:23:30,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:30,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:30,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:23:30,854 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2021-11-20 06:23:30,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:30,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844532414] [2021-11-20 06:23:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:30,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:31,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:31,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844532414] [2021-11-20 06:23:31,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844532414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:31,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986598057] [2021-11-20 06:23:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:31,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:31,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:31,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:31,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:23:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:23:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:31,221 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:23:31,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:23:31,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:23:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:31,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:31,687 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 35 treesize of output 33 [2021-11-20 06:23:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:31,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986598057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:31,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:31,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 06:23:31,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125486088] [2021-11-20 06:23:31,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:23:31,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:23:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:23:31,714 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:31,965 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-11-20 06:23:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:23:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 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 12 [2021-11-20 06:23:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:31,967 INFO L225 Difference]: With dead ends: 128 [2021-11-20 06:23:31,967 INFO L226 Difference]: Without dead ends: 128 [2021-11-20 06:23:31,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:23:31,968 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:31,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 261 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:23:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-20 06:23:31,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 53. [2021-11-20 06:23:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-11-20 06:23:31,972 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 12 [2021-11-20 06:23:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:31,972 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-11-20 06:23:31,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-11-20 06:23:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:23:31,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:31,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:32,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:32,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:32,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash 876828511, now seen corresponding path program 1 times [2021-11-20 06:23:32,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000503989] [2021-11-20 06:23:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:32,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:32,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:32,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000503989] [2021-11-20 06:23:32,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000503989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:32,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:32,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:23:32,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071413154] [2021-11-20 06:23:32,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:32,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:23:32,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:32,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:23:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:32,207 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:32,253 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-11-20 06:23:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:23:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:23:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:32,254 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:23:32,255 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 06:23:32,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:32,256 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:32,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 06:23:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 06:23:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-11-20 06:23:32,259 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2021-11-20 06:23:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:32,259 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-11-20 06:23:32,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,259 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-11-20 06:23:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:23:32,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:32,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:32,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:23:32,261 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash 876828512, now seen corresponding path program 1 times [2021-11-20 06:23:32,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:32,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997675736] [2021-11-20 06:23:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:32,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:32,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997675736] [2021-11-20 06:23:32,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997675736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:32,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:32,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:23:32,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198325550] [2021-11-20 06:23:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:32,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:23:32,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:23:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:23:32,354 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:32,465 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2021-11-20 06:23:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:23:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 06:23:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:32,467 INFO L225 Difference]: With dead ends: 72 [2021-11-20 06:23:32,467 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 06:23:32,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:32,468 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 185 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 06:23:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-11-20 06:23:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-20 06:23:32,471 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-11-20 06:23:32,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:32,472 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-20 06:23:32,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-20 06:23:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:23:32,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:32,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:23:32,473 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2021-11-20 06:23:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:32,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808710998] [2021-11-20 06:23:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:32,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:32,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:32,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808710998] [2021-11-20 06:23:32,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808710998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:32,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:32,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:23:32,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932244151] [2021-11-20 06:23:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:32,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:32,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:32,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:32,533 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:32,620 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-11-20 06:23:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:23:32,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:32,624 INFO L225 Difference]: With dead ends: 99 [2021-11-20 06:23:32,624 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 06:23:32,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:23:32,625 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:32,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 76 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 06:23:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2021-11-20 06:23:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.462962962962963) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2021-11-20 06:23:32,630 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 14 [2021-11-20 06:23:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:32,632 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2021-11-20 06:23:32,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2021-11-20 06:23:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:23:32,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:32,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:32,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:23:32,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash 818610617, now seen corresponding path program 1 times [2021-11-20 06:23:32,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:32,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307126125] [2021-11-20 06:23:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:32,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:32,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307126125] [2021-11-20 06:23:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307126125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:32,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463987982] [2021-11-20 06:23:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:32,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:32,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:23:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:23:32,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:32,934 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:23:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-20 06:23:32,940 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 22 [2021-11-20 06:23:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:33,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:23:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:33,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463987982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:33,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-20 06:23:33,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420085529] [2021-11-20 06:23:33,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:33,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:23:33,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:23:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:23:33,428 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-11-20 06:23:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:33,593 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2021-11-20 06:23:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:23:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) Word has length 15 [2021-11-20 06:23:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:33,595 INFO L225 Difference]: With dead ends: 85 [2021-11-20 06:23:33,595 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 06:23:33,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:23:33,596 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:33,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 386 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-20 06:23:33,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 06:23:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-11-20 06:23:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 72 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) [2021-11-20 06:23:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-11-20 06:23:33,601 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 15 [2021-11-20 06:23:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:33,601 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-11-20 06:23:33,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-11-20 06:23:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-11-20 06:23:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:23:33,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:33,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:33,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:33,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:23:33,824 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 705742569, now seen corresponding path program 1 times [2021-11-20 06:23:33,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846983720] [2021-11-20 06:23:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:33,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:33,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:33,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846983720] [2021-11-20 06:23:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846983720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:33,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:23:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313762156] [2021-11-20 06:23:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:33,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:33,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:33,860 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:33,936 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2021-11-20 06:23:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:23:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:33,937 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:23:33,938 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 06:23:33,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:33,939 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:33,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 06:23:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-20 06:23:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.4) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-11-20 06:23:33,943 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 17 [2021-11-20 06:23:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:33,943 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-11-20 06:23:33,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-11-20 06:23:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:23:33,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:33,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:33,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:23:33,945 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash 705742570, now seen corresponding path program 1 times [2021-11-20 06:23:33,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:33,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725428871] [2021-11-20 06:23:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:33,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:34,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:34,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725428871] [2021-11-20 06:23:34,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725428871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:34,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:34,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:23:34,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634002835] [2021-11-20 06:23:34,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:34,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:23:34,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:34,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:23:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:34,040 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:34,126 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2021-11-20 06:23:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:23:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:23:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:34,128 INFO L225 Difference]: With dead ends: 93 [2021-11-20 06:23:34,128 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:23:34,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:34,129 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 133 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:34,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 84 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:23:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2021-11-20 06:23:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.4) internal successors, (98), 76 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2021-11-20 06:23:34,134 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 17 [2021-11-20 06:23:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:34,134 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-11-20 06:23:34,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2021-11-20 06:23:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 06:23:34,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:34,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:34,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:23:34,136 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 705788370, now seen corresponding path program 2 times [2021-11-20 06:23:34,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442546569] [2021-11-20 06:23:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:34,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:34,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442546569] [2021-11-20 06:23:34,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442546569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:34,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:34,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:23:34,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850668693] [2021-11-20 06:23:34,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:34,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:23:34,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:34,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:23:34,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:23:34,294 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:34,674 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2021-11-20 06:23:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:23:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 06:23:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:34,676 INFO L225 Difference]: With dead ends: 141 [2021-11-20 06:23:34,676 INFO L226 Difference]: Without dead ends: 141 [2021-11-20 06:23:34,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:23:34,677 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 148 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:34,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 195 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-20 06:23:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 76. [2021-11-20 06:23:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 69 states have (on average 1.391304347826087) internal successors, (96), 75 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-20 06:23:34,681 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 17 [2021-11-20 06:23:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:34,681 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-20 06:23:34,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-20 06:23:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:23:34,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:34,682 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:34,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:23:34,683 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2021-11-20 06:23:34,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:34,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886017229] [2021-11-20 06:23:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:34,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:34,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886017229] [2021-11-20 06:23:34,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886017229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253923125] [2021-11-20 06:23:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:34,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:34,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:34,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:34,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:23:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:23:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:34,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253923125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:35,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:35,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-20 06:23:35,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988608611] [2021-11-20 06:23:35,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:35,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:23:35,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:23:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:23:35,064 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:35,311 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2021-11-20 06:23:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:23:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:23:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:35,314 INFO L225 Difference]: With dead ends: 254 [2021-11-20 06:23:35,314 INFO L226 Difference]: Without dead ends: 254 [2021-11-20 06:23:35,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:23:35,315 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 547 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:35,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 257 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-20 06:23:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 85. [2021-11-20 06:23:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.3717948717948718) internal successors, (107), 84 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-11-20 06:23:35,321 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 18 [2021-11-20 06:23:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:35,321 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-11-20 06:23:35,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-11-20 06:23:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:23:35,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:35,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:35,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:35,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:23:35,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -795987946, now seen corresponding path program 1 times [2021-11-20 06:23:35,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:35,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760509736] [2021-11-20 06:23:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:35,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:35,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760509736] [2021-11-20 06:23:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760509736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326434439] [2021-11-20 06:23:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:35,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:35,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:35,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:23:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:23:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:35,749 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:23:35,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:23:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:23:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:35,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:36,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:23:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326434439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:36,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:36,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-11-20 06:23:36,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683181313] [2021-11-20 06:23:36,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:23:36,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:23:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:23:36,188 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:36,930 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2021-11-20 06:23:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:23:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 06:23:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:36,937 INFO L225 Difference]: With dead ends: 197 [2021-11-20 06:23:36,938 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:23:36,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:23:36,940 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 954 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:36,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 427 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:23:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:23:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 102. [2021-11-20 06:23:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 101 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-11-20 06:23:36,954 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 19 [2021-11-20 06:23:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:36,954 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-11-20 06:23:36,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-11-20 06:23:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:23:36,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:36,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:36,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:37,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:37,160 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 35317445, now seen corresponding path program 1 times [2021-11-20 06:23:37,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151539742] [2021-11-20 06:23:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:37,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:37,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:37,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151539742] [2021-11-20 06:23:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151539742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:37,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:37,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:23:37,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561606657] [2021-11-20 06:23:37,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:37,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:37,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:23:37,215 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:37,255 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-11-20 06:23:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:23:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:23:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:37,257 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:23:37,257 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 06:23:37,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:23:37,259 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:37,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 105 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 06:23:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2021-11-20 06:23:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2021-11-20 06:23:37,268 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 22 [2021-11-20 06:23:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:37,268 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2021-11-20 06:23:37,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2021-11-20 06:23:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:23:37,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:37,270 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:37,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:23:37,270 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2021-11-20 06:23:37,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:37,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135753266] [2021-11-20 06:23:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:37,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:23:37,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135753266] [2021-11-20 06:23:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135753266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161078207] [2021-11-20 06:23:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:23:37,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:37,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:37,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:23:37,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:23:37,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:23:37,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:37,454 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:23:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:23:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:23:37,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:23:37,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161078207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:37,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:37,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 06:23:37,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507537860] [2021-11-20 06:23:37,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:37,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:23:37,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:23:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:23:37,954 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 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) [2021-11-20 06:23:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:38,154 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2021-11-20 06:23:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:23:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 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) Word has length 22 [2021-11-20 06:23:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:38,156 INFO L225 Difference]: With dead ends: 200 [2021-11-20 06:23:38,156 INFO L226 Difference]: Without dead ends: 200 [2021-11-20 06:23:38,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:23:38,157 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 283 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:38,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 166 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-20 06:23:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 92. [2021-11-20 06:23:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 91 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-11-20 06:23:38,162 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 22 [2021-11-20 06:23:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:38,162 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-11-20 06:23:38,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 11 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) [2021-11-20 06:23:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2021-11-20 06:23:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:23:38,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:38,163 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:38,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:23:38,384 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2134181768, now seen corresponding path program 2 times [2021-11-20 06:23:38,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:38,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614252163] [2021-11-20 06:23:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:38,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:38,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:38,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614252163] [2021-11-20 06:23:38,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614252163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412895453] [2021-11-20 06:23:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:23:38,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:38,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:38,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:23:38,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:23:38,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:23:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:38,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:23:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:23:39,124 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-20 06:23:39,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-20 06:23:39,438 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-20 06:23:39,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 27 [2021-11-20 06:23:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:39,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:42,743 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 18 treesize of output 16 [2021-11-20 06:23:42,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:23:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:42,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412895453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:42,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:42,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 27 [2021-11-20 06:23:42,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939022797] [2021-11-20 06:23:42,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:42,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:23:42,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:23:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:23:42,900 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:43,346 INFO L93 Difference]: Finished difference Result 201 states and 235 transitions. [2021-11-20 06:23:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:23:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:23:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:43,352 INFO L225 Difference]: With dead ends: 201 [2021-11-20 06:23:43,352 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 06:23:43,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:23:43,354 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:43,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 519 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 289 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2021-11-20 06:23:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 06:23:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 103. [2021-11-20 06:23:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 102 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2021-11-20 06:23:43,360 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 23 [2021-11-20 06:23:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:43,361 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2021-11-20 06:23:43,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2021-11-20 06:23:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:23:43,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:43,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:43,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:43,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:43,564 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 79040412, now seen corresponding path program 1 times [2021-11-20 06:23:43,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477699217] [2021-11-20 06:23:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:43,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:43,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477699217] [2021-11-20 06:23:43,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477699217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:43,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101692924] [2021-11-20 06:23:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:43,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:43,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:43,650 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:43,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:23:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:23:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:43,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:44,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101692924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:44,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:44,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-11-20 06:23:44,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215686682] [2021-11-20 06:23:44,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:23:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:23:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:23:44,017 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:44,091 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2021-11-20 06:23:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:23:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:23:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:44,094 INFO L225 Difference]: With dead ends: 205 [2021-11-20 06:23:44,094 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 06:23:44,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:44,095 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:44,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 202 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 06:23:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-11-20 06:23:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 175 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2021-11-20 06:23:44,102 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 23 [2021-11-20 06:23:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:44,102 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2021-11-20 06:23:44,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2021-11-20 06:23:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:23:44,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:44,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:44,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:44,320 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1609903330, now seen corresponding path program 1 times [2021-11-20 06:23:44,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:44,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355663560] [2021-11-20 06:23:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:44,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:44,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355663560] [2021-11-20 06:23:44,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355663560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:44,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:23:44,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827097739] [2021-11-20 06:23:44,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:44,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:23:44,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:44,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:23:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:44,430 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:44,579 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2021-11-20 06:23:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:23:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:23:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:44,582 INFO L225 Difference]: With dead ends: 260 [2021-11-20 06:23:44,583 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 06:23:44,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:23:44,584 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:44,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 252 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 06:23:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 191. [2021-11-20 06:23:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2419354838709677) internal successors, (231), 190 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2021-11-20 06:23:44,592 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 23 [2021-11-20 06:23:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:44,592 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2021-11-20 06:23:44,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2021-11-20 06:23:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:23:44,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:44,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:44,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:23:44,594 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1867415516, now seen corresponding path program 1 times [2021-11-20 06:23:44,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899659192] [2021-11-20 06:23:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:44,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:44,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899659192] [2021-11-20 06:23:44,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899659192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:44,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:44,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:23:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356829304] [2021-11-20 06:23:44,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:23:44,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:23:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:23:44,751 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:45,065 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2021-11-20 06:23:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:23:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 06:23:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:45,068 INFO L225 Difference]: With dead ends: 223 [2021-11-20 06:23:45,068 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 06:23:45,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:23:45,069 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:45,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 211 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 06:23:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2021-11-20 06:23:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2556818181818181) internal successors, (221), 180 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2021-11-20 06:23:45,075 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 23 [2021-11-20 06:23:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:45,075 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2021-11-20 06:23:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2021-11-20 06:23:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:23:45,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:45,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:45,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-20 06:23:45,077 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:45,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1387621483, now seen corresponding path program 1 times [2021-11-20 06:23:45,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:45,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362676529] [2021-11-20 06:23:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:45,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:45,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362676529] [2021-11-20 06:23:45,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362676529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:45,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:45,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:23:45,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728575272] [2021-11-20 06:23:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:45,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:23:45,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:23:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:45,153 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:45,180 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2021-11-20 06:23:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:23:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:23:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:45,181 INFO L225 Difference]: With dead ends: 180 [2021-11-20 06:23:45,182 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 06:23:45,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:23:45,183 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:45,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:23:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 06:23:45,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-20 06:23:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.178294573643411) internal successors, (152), 132 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-11-20 06:23:45,187 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 25 [2021-11-20 06:23:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:45,188 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-11-20 06:23:45,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-11-20 06:23:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:23:45,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:45,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:45,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 06:23:45,189 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash -725186331, now seen corresponding path program 3 times [2021-11-20 06:23:45,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:45,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423732796] [2021-11-20 06:23:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:45,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:45,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423732796] [2021-11-20 06:23:45,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423732796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155301205] [2021-11-20 06:23:45,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:23:45,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:45,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:45,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:23:45,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:23:45,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:23:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:45,478 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:23:45,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:23:45,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:23:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:45,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:46,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:23:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:46,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155301205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:46,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:46,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2021-11-20 06:23:46,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075420987] [2021-11-20 06:23:46,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:46,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:23:46,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:23:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:23:46,198 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:46,870 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2021-11-20 06:23:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:23:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:23:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:46,872 INFO L225 Difference]: With dead ends: 208 [2021-11-20 06:23:46,872 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 06:23:46,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:23:46,873 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 292 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:46,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 356 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:23:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 06:23:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2021-11-20 06:23:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1736111111111112) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-11-20 06:23:46,879 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 27 [2021-11-20 06:23:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:46,879 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-11-20 06:23:46,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-11-20 06:23:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:23:46,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:46,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:46,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:47,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:23:47,082 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash -424812231, now seen corresponding path program 1 times [2021-11-20 06:23:47,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:47,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582863420] [2021-11-20 06:23:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:47,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:47,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:47,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582863420] [2021-11-20 06:23:47,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582863420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:47,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:23:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958972300] [2021-11-20 06:23:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:23:47,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:23:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:23:47,225 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:47,521 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-11-20 06:23:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:23:47,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:23:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:47,523 INFO L225 Difference]: With dead ends: 218 [2021-11-20 06:23:47,523 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 06:23:47,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:23:47,524 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:47,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 188 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:23:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 06:23:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 150. [2021-11-20 06:23:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.178082191780822) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2021-11-20 06:23:47,529 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 27 [2021-11-20 06:23:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:47,529 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2021-11-20 06:23:47,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2021-11-20 06:23:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:23:47,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:47,531 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:47,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-20 06:23:47,531 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1119361538, now seen corresponding path program 4 times [2021-11-20 06:23:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:47,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632717035] [2021-11-20 06:23:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:47,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:47,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632717035] [2021-11-20 06:23:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632717035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989288300] [2021-11-20 06:23:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:23:47,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:47,728 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:47,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:23:47,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:23:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:23:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:47,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:23:47,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:23:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 06:23:48,301 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-20 06:23:48,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-20 06:23:48,783 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-20 06:23:48,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2021-11-20 06:23:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:48,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-20 06:23:51,181 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 49 treesize of output 47 [2021-11-20 06:23:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:51,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989288300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:51,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2021-11-20 06:23:51,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163575369] [2021-11-20 06:23:51,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:51,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:23:51,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:23:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1198, Unknown=1, NotChecked=0, Total=1332 [2021-11-20 06:23:51,197 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:52,430 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2021-11-20 06:23:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:23:52,432 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 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 29 [2021-11-20 06:23:52,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:52,434 INFO L225 Difference]: With dead ends: 296 [2021-11-20 06:23:52,434 INFO L226 Difference]: Without dead ends: 259 [2021-11-20 06:23:52,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=310, Invalid=2551, Unknown=1, NotChecked=0, Total=2862 [2021-11-20 06:23:52,436 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 148 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:52,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 762 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 556 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2021-11-20 06:23:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-20 06:23:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-11-20 06:23:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 172 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 198 transitions. [2021-11-20 06:23:52,444 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 198 transitions. Word has length 29 [2021-11-20 06:23:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:52,444 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 198 transitions. [2021-11-20 06:23:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 198 transitions. [2021-11-20 06:23:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:23:52,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:52,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:52,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:52,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:23:52,672 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash 515027158, now seen corresponding path program 1 times [2021-11-20 06:23:52,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840893088] [2021-11-20 06:23:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:52,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:52,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840893088] [2021-11-20 06:23:52,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840893088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103006984] [2021-11-20 06:23:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:52,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:52,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:52,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:23:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:52,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:23:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:53,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:53,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 06:23:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:53,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103006984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:53,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:53,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-11-20 06:23:53,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804751653] [2021-11-20 06:23:53,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:23:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:23:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:23:53,282 INFO L87 Difference]: Start difference. First operand 173 states and 198 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:53,661 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2021-11-20 06:23:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:23:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) Word has length 31 [2021-11-20 06:23:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:53,666 INFO L225 Difference]: With dead ends: 212 [2021-11-20 06:23:53,666 INFO L226 Difference]: Without dead ends: 212 [2021-11-20 06:23:53,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:23:53,674 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 255 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:53,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 276 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:23:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-20 06:23:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 191. [2021-11-20 06:23:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 190 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2021-11-20 06:23:53,687 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 31 [2021-11-20 06:23:53,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:53,688 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2021-11-20 06:23:53,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2021-11-20 06:23:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:23:53,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:53,689 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:53,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:53,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:53,912 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:53,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash 496512411, now seen corresponding path program 5 times [2021-11-20 06:23:53,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:53,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344725843] [2021-11-20 06:23:53,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:53,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:54,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:54,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344725843] [2021-11-20 06:23:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344725843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:54,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73816829] [2021-11-20 06:23:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:23:54,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:54,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:54,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:54,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:23:54,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 06:23:54,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:23:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:54,244 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:23:54,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:23:54,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 06:23:55,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:23:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-20 06:23:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:55,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:23:55,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-20 06:23:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:23:56,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73816829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:23:56,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:23:56,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2021-11-20 06:23:56,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861738566] [2021-11-20 06:23:56,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:23:56,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-20 06:23:56,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-20 06:23:56,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:23:56,401 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 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) [2021-11-20 06:23:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:58,234 INFO L93 Difference]: Finished difference Result 265 states and 292 transitions. [2021-11-20 06:23:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:23:58,234 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 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 33 [2021-11-20 06:23:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:58,236 INFO L225 Difference]: With dead ends: 265 [2021-11-20 06:23:58,236 INFO L226 Difference]: Without dead ends: 265 [2021-11-20 06:23:58,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:23:58,239 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 242 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:58,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 916 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 811 Invalid, 0 Unknown, 256 Unchecked, 0.5s Time] [2021-11-20 06:23:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-20 06:23:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 197. [2021-11-20 06:23:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.160621761658031) internal successors, (224), 196 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:23:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 224 transitions. [2021-11-20 06:23:58,245 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 224 transitions. Word has length 33 [2021-11-20 06:23:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:58,246 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 224 transitions. [2021-11-20 06:23:58,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 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) [2021-11-20 06:23:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 224 transitions. [2021-11-20 06:23:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:23:58,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:58,247 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:58,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:23:58,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:58,460 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:23:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 407057716, now seen corresponding path program 6 times [2021-11-20 06:23:58,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:58,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232584542] [2021-11-20 06:23:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:58,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:58,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232584542] [2021-11-20 06:23:58,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232584542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435239250] [2021-11-20 06:23:58,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:23:58,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:58,700 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:58,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:23:58,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 06:23:58,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:23:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 06:23:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:58,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:23:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:23:59,129 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-20 06:23:59,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-20 06:23:59,673 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:23:59,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 27 [2021-11-20 06:23:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:59,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:04,760 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 18 treesize of output 16 [2021-11-20 06:24:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:24:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:05,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435239250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:05,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 34 [2021-11-20 06:24:05,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918986314] [2021-11-20 06:24:05,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:05,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:24:05,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:24:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:24:05,050 INFO L87 Difference]: Start difference. First operand 197 states and 224 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:05,611 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2021-11-20 06:24:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:24:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 06:24:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:05,615 INFO L225 Difference]: With dead ends: 365 [2021-11-20 06:24:05,615 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 06:24:05,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:24:05,616 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 132 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:05,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 938 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 403 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-11-20 06:24:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 06:24:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 243. [2021-11-20 06:24:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.1589958158995817) internal successors, (277), 242 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 277 transitions. [2021-11-20 06:24:05,624 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 277 transitions. Word has length 35 [2021-11-20 06:24:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:05,625 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 277 transitions. [2021-11-20 06:24:05,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 277 transitions. [2021-11-20 06:24:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:24:05,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:05,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:05,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:05,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:05,840 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1933322104, now seen corresponding path program 2 times [2021-11-20 06:24:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:05,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037060614] [2021-11-20 06:24:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:05,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:06,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037060614] [2021-11-20 06:24:06,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037060614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722987079] [2021-11-20 06:24:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:24:06,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:06,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:06,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:24:06,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:24:06,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 06:24:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:06,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:24:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 06:24:06,975 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 06:24:06,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 06:24:07,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:24:07,154 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 27 treesize of output 27 [2021-11-20 06:24:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:07,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:08,540 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 77 treesize of output 71 [2021-11-20 06:24:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:24:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722987079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:08,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:08,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 44 [2021-11-20 06:24:08,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471288513] [2021-11-20 06:24:08,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:08,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 06:24:08,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:08,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 06:24:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:24:08,939 INFO L87 Difference]: Start difference. First operand 243 states and 277 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:09,920 INFO L93 Difference]: Finished difference Result 272 states and 305 transitions. [2021-11-20 06:24:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:24:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 06:24:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:09,925 INFO L225 Difference]: With dead ends: 272 [2021-11-20 06:24:09,925 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 06:24:09,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:24:09,928 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:09,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 331 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 346 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-11-20 06:24:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 06:24:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2021-11-20 06:24:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.1594827586206897) internal successors, (269), 235 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 269 transitions. [2021-11-20 06:24:09,937 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 269 transitions. Word has length 37 [2021-11-20 06:24:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:09,938 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 269 transitions. [2021-11-20 06:24:09,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 269 transitions. [2021-11-20 06:24:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:24:09,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:09,941 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:09,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:10,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:10,162 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1211405073, now seen corresponding path program 7 times [2021-11-20 06:24:10,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514267325] [2021-11-20 06:24:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:10,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:10,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514267325] [2021-11-20 06:24:10,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514267325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786152910] [2021-11-20 06:24:10,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:24:10,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:10,408 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:10,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:24:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:24:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:10,509 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:24:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:24:10,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:24:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:11,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:11,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:24:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:11,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786152910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:11,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2021-11-20 06:24:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318648820] [2021-11-20 06:24:11,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-20 06:24:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-20 06:24:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 06:24:11,636 INFO L87 Difference]: Start difference. First operand 236 states and 269 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:12,851 INFO L93 Difference]: Finished difference Result 444 states and 485 transitions. [2021-11-20 06:24:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:24:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 06:24:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:12,853 INFO L225 Difference]: With dead ends: 444 [2021-11-20 06:24:12,854 INFO L226 Difference]: Without dead ends: 424 [2021-11-20 06:24:12,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=551, Invalid=2311, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 06:24:12,856 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 715 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:12,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 957 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:24:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-20 06:24:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 278. [2021-11-20 06:24:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 274 states have (on average 1.1423357664233578) internal successors, (313), 277 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) [2021-11-20 06:24:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 313 transitions. [2021-11-20 06:24:12,866 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 313 transitions. Word has length 39 [2021-11-20 06:24:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:12,867 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 313 transitions. [2021-11-20 06:24:12,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 313 transitions. [2021-11-20 06:24:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:24:12,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:12,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:12,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 06:24:13,069 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -22467999, now seen corresponding path program 1 times [2021-11-20 06:24:13,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190996478] [2021-11-20 06:24:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:24:13,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:13,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190996478] [2021-11-20 06:24:13,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190996478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:13,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954091662] [2021-11-20 06:24:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:13,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:13,458 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:13,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:24:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-20 06:24:13,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:13,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:24:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:24:14,103 INFO L354 Elim1Store]: treesize reduction 35, result has 38.6 percent of original size [2021-11-20 06:24:14,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 51 [2021-11-20 06:24:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:24:15,061 INFO L354 Elim1Store]: treesize reduction 50, result has 28.6 percent of original size [2021-11-20 06:24:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 59 [2021-11-20 06:24:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:15,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:15,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:24:15,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-20 06:24:29,577 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 119 treesize of output 111 [2021-11-20 06:24:29,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:24:29,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 107 [2021-11-20 06:24:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:24:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954091662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:29,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:29,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 19] total 54 [2021-11-20 06:24:29,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314040108] [2021-11-20 06:24:29,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:29,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-20 06:24:29,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-20 06:24:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2620, Unknown=3, NotChecked=0, Total=2862 [2021-11-20 06:24:29,997 INFO L87 Difference]: Start difference. First operand 278 states and 313 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:31,592 INFO L93 Difference]: Finished difference Result 340 states and 377 transitions. [2021-11-20 06:24:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:24:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-11-20 06:24:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:31,594 INFO L225 Difference]: With dead ends: 340 [2021-11-20 06:24:31,594 INFO L226 Difference]: Without dead ends: 315 [2021-11-20 06:24:31,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=497, Invalid=5050, Unknown=3, NotChecked=0, Total=5550 [2021-11-20 06:24:31,596 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:31,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 515 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2021-11-20 06:24:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-20 06:24:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 267. [2021-11-20 06:24:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 263 states have (on average 1.144486692015209) internal successors, (301), 266 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 301 transitions. [2021-11-20 06:24:31,604 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 301 transitions. Word has length 39 [2021-11-20 06:24:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:31,604 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 301 transitions. [2021-11-20 06:24:31,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 301 transitions. [2021-11-20 06:24:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:24:31,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:31,606 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:31,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:31,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:31,816 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash 224138538, now seen corresponding path program 8 times [2021-11-20 06:24:31,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:31,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993848915] [2021-11-20 06:24:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:31,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:32,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993848915] [2021-11-20 06:24:32,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993848915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:32,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054772819] [2021-11-20 06:24:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:24:32,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:32,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:32,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:24:32,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:24:32,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 06:24:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:32,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:24:32,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:24:32,529 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-20 06:24:32,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-20 06:24:33,058 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:24:33,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 27 [2021-11-20 06:24:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:33,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:36,199 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 18 treesize of output 16 [2021-11-20 06:24:36,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:24:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:36,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054772819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:36,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:36,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 39 [2021-11-20 06:24:36,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046649996] [2021-11-20 06:24:36,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:36,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:24:36,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:24:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:24:36,522 INFO L87 Difference]: Start difference. First operand 267 states and 301 transitions. Second operand has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:37,127 INFO L93 Difference]: Finished difference Result 448 states and 494 transitions. [2021-11-20 06:24:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:24:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 06:24:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:37,131 INFO L225 Difference]: With dead ends: 448 [2021-11-20 06:24:37,131 INFO L226 Difference]: Without dead ends: 414 [2021-11-20 06:24:37,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:24:37,133 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:37,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1286 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 632 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2021-11-20 06:24:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-20 06:24:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 294. [2021-11-20 06:24:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 290 states have (on average 1.1482758620689655) internal successors, (333), 293 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 333 transitions. [2021-11-20 06:24:37,143 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 333 transitions. Word has length 41 [2021-11-20 06:24:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:37,144 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 333 transitions. [2021-11-20 06:24:37,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 333 transitions. [2021-11-20 06:24:37,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:24:37,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:37,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:37,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 06:24:37,360 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:37,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:37,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2099498562, now seen corresponding path program 2 times [2021-11-20 06:24:37,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:37,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101887846] [2021-11-20 06:24:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:37,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:24:37,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101887846] [2021-11-20 06:24:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101887846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895124278] [2021-11-20 06:24:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:24:37,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:37,681 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:24:37,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:24:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 06:24:37,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:24:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:24:38,421 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 06:24:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 06:24:38,505 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 21 treesize of output 13 [2021-11-20 06:24:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:24:38,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:38,783 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 85 treesize of output 79 [2021-11-20 06:24:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:24:39,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895124278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:39,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:39,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2021-11-20 06:24:39,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040823393] [2021-11-20 06:24:39,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:39,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:24:39,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:39,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:24:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:24:39,176 INFO L87 Difference]: Start difference. First operand 294 states and 333 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:39,513 INFO L93 Difference]: Finished difference Result 508 states and 565 transitions. [2021-11-20 06:24:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:24:39,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 06:24:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:39,516 INFO L225 Difference]: With dead ends: 508 [2021-11-20 06:24:39,516 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 06:24:39,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:24:39,518 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:39,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 402 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 248 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2021-11-20 06:24:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 06:24:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 347. [2021-11-20 06:24:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 343 states have (on average 1.1399416909620992) internal successors, (391), 346 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 391 transitions. [2021-11-20 06:24:39,529 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 391 transitions. Word has length 43 [2021-11-20 06:24:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 391 transitions. [2021-11-20 06:24:39,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 391 transitions. [2021-11-20 06:24:39,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:24:39,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:39,531 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:39,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:24:39,752 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash 315939143, now seen corresponding path program 9 times [2021-11-20 06:24:39,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:39,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219622624] [2021-11-20 06:24:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:39,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:40,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219622624] [2021-11-20 06:24:40,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219622624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171328807] [2021-11-20 06:24:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:24:40,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:40,096 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:40,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:24:40,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 06:24:40,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 06:24:40,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:40,246 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:24:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:24:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:24:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:41,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:24:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:41,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171328807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:41,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:41,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2021-11-20 06:24:41,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446762147] [2021-11-20 06:24:41,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:41,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 06:24:41,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 06:24:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:24:41,853 INFO L87 Difference]: Start difference. First operand 347 states and 391 transitions. Second operand has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:43,249 INFO L93 Difference]: Finished difference Result 611 states and 667 transitions. [2021-11-20 06:24:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:24:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 06:24:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:43,253 INFO L225 Difference]: With dead ends: 611 [2021-11-20 06:24:43,253 INFO L226 Difference]: Without dead ends: 591 [2021-11-20 06:24:43,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=788, Invalid=3118, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:24:43,256 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 824 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:43,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 869 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:24:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-20 06:24:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 376. [2021-11-20 06:24:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 372 states have (on average 1.1344086021505377) internal successors, (422), 375 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 422 transitions. [2021-11-20 06:24:43,268 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 422 transitions. Word has length 45 [2021-11-20 06:24:43,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:43,269 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 422 transitions. [2021-11-20 06:24:43,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.840909090909091) internal successors, (125), 45 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:43,269 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 422 transitions. [2021-11-20 06:24:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:24:43,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:43,271 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:43,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:43,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:24:43,496 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash -801015308, now seen corresponding path program 1 times [2021-11-20 06:24:43,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514421357] [2021-11-20 06:24:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:43,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:43,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514421357] [2021-11-20 06:24:43,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514421357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:43,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766970514] [2021-11-20 06:24:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:43,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:43,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:43,706 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:43,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:24:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:24:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:43,790 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:24:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:24:43,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:24:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:44,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:44,772 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 30 treesize of output 28 [2021-11-20 06:24:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:44,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766970514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:44,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:44,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-11-20 06:24:44,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520760802] [2021-11-20 06:24:44,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:44,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:24:44,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:24:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:24:44,792 INFO L87 Difference]: Start difference. First operand 376 states and 422 transitions. Second operand has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:45,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:45,398 INFO L93 Difference]: Finished difference Result 538 states and 589 transitions. [2021-11-20 06:24:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:24:45,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-20 06:24:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:45,401 INFO L225 Difference]: With dead ends: 538 [2021-11-20 06:24:45,401 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 06:24:45,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=1389, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:24:45,403 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 354 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:45,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 402 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:24:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 06:24:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 348. [2021-11-20 06:24:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 344 states have (on average 1.130813953488372) internal successors, (389), 347 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 389 transitions. [2021-11-20 06:24:45,415 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 389 transitions. Word has length 46 [2021-11-20 06:24:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:45,415 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 389 transitions. [2021-11-20 06:24:45,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.129032258064516) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 389 transitions. [2021-11-20 06:24:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:24:45,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:45,417 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:45,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:45,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 06:24:45,635 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:45,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1325160992, now seen corresponding path program 10 times [2021-11-20 06:24:45,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:45,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651764618] [2021-11-20 06:24:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:45,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:24:46,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:46,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651764618] [2021-11-20 06:24:46,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651764618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:46,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431518898] [2021-11-20 06:24:46,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:24:46,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:46,036 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:24:46,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:24:46,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 06:24:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:46,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:24:46,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:24:46,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 06:24:47,047 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-20 06:24:47,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-20 06:24:47,920 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-20 06:24:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2021-11-20 06:24:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:49,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-20 06:24:50,772 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 49 treesize of output 47 [2021-11-20 06:24:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:50,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431518898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:50,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:50,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 55 [2021-11-20 06:24:50,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069901492] [2021-11-20 06:24:50,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 06:24:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 06:24:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2701, Unknown=1, NotChecked=0, Total=2970 [2021-11-20 06:24:50,787 INFO L87 Difference]: Start difference. First operand 348 states and 389 transitions. Second operand has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:53,018 INFO L93 Difference]: Finished difference Result 725 states and 786 transitions. [2021-11-20 06:24:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 06:24:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-20 06:24:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:53,022 INFO L225 Difference]: With dead ends: 725 [2021-11-20 06:24:53,022 INFO L226 Difference]: Without dead ends: 655 [2021-11-20 06:24:53,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=568, Invalid=5911, Unknown=1, NotChecked=0, Total=6480 [2021-11-20 06:24:53,025 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 252 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:53,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2433 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1427 Invalid, 0 Unknown, 300 Unchecked, 0.9s Time] [2021-11-20 06:24:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-20 06:24:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 377. [2021-11-20 06:24:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 373 states have (on average 1.1313672922252012) internal successors, (422), 376 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 422 transitions. [2021-11-20 06:24:53,037 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 422 transitions. Word has length 47 [2021-11-20 06:24:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 422 transitions. [2021-11-20 06:24:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 422 transitions. [2021-11-20 06:24:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:24:53,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:53,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:53,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:53,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:24:53,264 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash 599820123, now seen corresponding path program 3 times [2021-11-20 06:24:53,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661124485] [2021-11-20 06:24:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:53,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:24:53,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661124485] [2021-11-20 06:24:53,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661124485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779550803] [2021-11-20 06:24:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:24:53,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:53,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:53,464 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:24:53,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:24:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:53,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:24:53,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:53,593 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:24:53,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:24:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:24:54,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:24:54,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779550803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:54,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:54,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-11-20 06:24:54,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255091292] [2021-11-20 06:24:54,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:54,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:24:54,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:24:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:24:54,595 INFO L87 Difference]: Start difference. First operand 377 states and 422 transitions. Second operand has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 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) [2021-11-20 06:24:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:55,112 INFO L93 Difference]: Finished difference Result 501 states and 544 transitions. [2021-11-20 06:24:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:24:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 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) Word has length 47 [2021-11-20 06:24:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:55,115 INFO L225 Difference]: With dead ends: 501 [2021-11-20 06:24:55,115 INFO L226 Difference]: Without dead ends: 501 [2021-11-20 06:24:55,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:24:55,116 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 406 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:55,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 317 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:24:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-20 06:24:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 393. [2021-11-20 06:24:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.1233933161953729) internal successors, (437), 392 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 437 transitions. [2021-11-20 06:24:55,127 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 437 transitions. Word has length 47 [2021-11-20 06:24:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:55,127 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 437 transitions. [2021-11-20 06:24:55,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.0) internal successors, (116), 30 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) [2021-11-20 06:24:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 437 transitions. [2021-11-20 06:24:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:24:55,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:55,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:55,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:55,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:55,344 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1568194937, now seen corresponding path program 1 times [2021-11-20 06:24:55,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816399291] [2021-11-20 06:24:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:55,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:24:55,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816399291] [2021-11-20 06:24:55,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816399291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847584804] [2021-11-20 06:24:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:55,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:55,600 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:55,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:24:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:55,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 06:24:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:55,712 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:24:55,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:24:55,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:24:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:24:56,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:24:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:24:57,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847584804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:57,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:57,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-11-20 06:24:57,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102394883] [2021-11-20 06:24:57,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:57,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:24:57,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:24:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:24:57,115 INFO L87 Difference]: Start difference. First operand 393 states and 437 transitions. Second operand has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:58,841 INFO L93 Difference]: Finished difference Result 626 states and 683 transitions. [2021-11-20 06:24:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:24:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-20 06:24:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:58,845 INFO L225 Difference]: With dead ends: 626 [2021-11-20 06:24:58,845 INFO L226 Difference]: Without dead ends: 620 [2021-11-20 06:24:58,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=664, Invalid=2996, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:24:58,846 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 532 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:58,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 390 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:24:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-20 06:24:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 454. [2021-11-20 06:24:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.1311111111111112) internal successors, (509), 453 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) [2021-11-20 06:24:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 509 transitions. [2021-11-20 06:24:58,860 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 509 transitions. Word has length 50 [2021-11-20 06:24:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:58,860 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 509 transitions. [2021-11-20 06:24:58,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 36 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:24:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 509 transitions. [2021-11-20 06:24:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:24:58,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:58,862 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:58,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:59,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:59,076 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:24:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1171395, now seen corresponding path program 11 times [2021-11-20 06:24:59,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:59,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032249121] [2021-11-20 06:24:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:59,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:24:59,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032249121] [2021-11-20 06:24:59,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032249121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662793810] [2021-11-20 06:24:59,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:24:59,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:59,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:59,412 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:24:59,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:24:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:24:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 06:24:59,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:59,525 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:24:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:24:59,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:25:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:00,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:01,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:25:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 66 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:01,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662793810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:01,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:01,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2021-11-20 06:25:01,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930233805] [2021-11-20 06:25:01,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:01,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 06:25:01,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 06:25:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:25:01,075 INFO L87 Difference]: Start difference. First operand 454 states and 509 transitions. Second operand has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:02,582 INFO L93 Difference]: Finished difference Result 904 states and 985 transitions. [2021-11-20 06:25:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:25:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 06:25:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:02,587 INFO L225 Difference]: With dead ends: 904 [2021-11-20 06:25:02,587 INFO L226 Difference]: Without dead ends: 884 [2021-11-20 06:25:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=794, Invalid=3238, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 06:25:02,588 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 596 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:02,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 1390 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:25:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-20 06:25:02,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 504. [2021-11-20 06:25:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.124) internal successors, (562), 503 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 562 transitions. [2021-11-20 06:25:02,604 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 562 transitions. Word has length 51 [2021-11-20 06:25:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:02,605 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 562 transitions. [2021-11-20 06:25:02,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.0434782608695654) internal successors, (140), 47 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 562 transitions. [2021-11-20 06:25:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:25:02,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:02,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:02,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:02,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:02,832 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:25:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash 620577460, now seen corresponding path program 3 times [2021-11-20 06:25:02,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:02,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974818875] [2021-11-20 06:25:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:02,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:03,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974818875] [2021-11-20 06:25:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974818875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960372279] [2021-11-20 06:25:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:25:03,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:03,707 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:03,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:25:03,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:25:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:25:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 06:25:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:25:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:25:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:25:04,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:25:04,621 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:25:04,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-20 06:25:04,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:25:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:04,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:11,926 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 1)) 0)) is different from false [2021-11-20 06:25:22,311 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_#t~mem5#1_63| Int) (|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_168| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_168| |v_ULTIMATE.start_cstrncat_#t~mem5#1_63|)) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-11-20 06:25:22,315 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 774 treesize of output 750 [2021-11-20 06:25:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2021-11-20 06:25:23,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960372279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:23,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:23,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 18] total 42 [2021-11-20 06:25:23,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184970568] [2021-11-20 06:25:23,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:23,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 06:25:23,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:23,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 06:25:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1362, Unknown=17, NotChecked=154, Total=1722 [2021-11-20 06:25:23,071 INFO L87 Difference]: Start difference. First operand 504 states and 562 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:25,805 INFO L93 Difference]: Finished difference Result 543 states and 599 transitions. [2021-11-20 06:25:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:25:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 06:25:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:25,808 INFO L225 Difference]: With dead ends: 543 [2021-11-20 06:25:25,809 INFO L226 Difference]: Without dead ends: 488 [2021-11-20 06:25:25,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 74 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=359, Invalid=2387, Unknown=18, NotChecked=206, Total=2970 [2021-11-20 06:25:25,810 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:25,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 439 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 488 Invalid, 0 Unknown, 277 Unchecked, 0.3s Time] [2021-11-20 06:25:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-20 06:25:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 485. [2021-11-20 06:25:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 481 states have (on average 1.1205821205821205) internal successors, (539), 484 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 539 transitions. [2021-11-20 06:25:25,821 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 539 transitions. Word has length 51 [2021-11-20 06:25:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:25,821 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 539 transitions. [2021-11-20 06:25:25,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 539 transitions. [2021-11-20 06:25:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 06:25:25,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:25,823 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:25,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:26,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-20 06:25:26,036 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:25:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1125709994, now seen corresponding path program 12 times [2021-11-20 06:25:26,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:26,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080525417] [2021-11-20 06:25:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:26,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:25:26,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080525417] [2021-11-20 06:25:26,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080525417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016939272] [2021-11-20 06:25:26,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:25:26,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:26,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:26,463 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:26,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:25:26,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 06:25:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:25:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 06:25:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:26,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:25:27,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:25:27,075 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-20 06:25:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-20 06:25:27,955 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:25:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 27 [2021-11-20 06:25:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:25:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:34,651 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 18 treesize of output 16 [2021-11-20 06:25:34,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:25:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:25:35,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016939272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:35,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:35,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 49 [2021-11-20 06:25:35,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426321313] [2021-11-20 06:25:35,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:35,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:25:35,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:25:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:25:35,160 INFO L87 Difference]: Start difference. First operand 485 states and 539 transitions. Second operand has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:36,173 INFO L93 Difference]: Finished difference Result 913 states and 998 transitions. [2021-11-20 06:25:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:25:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 06:25:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:36,177 INFO L225 Difference]: With dead ends: 913 [2021-11-20 06:25:36,177 INFO L226 Difference]: Without dead ends: 854 [2021-11-20 06:25:36,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=235, Invalid=3305, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:25:36,177 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 193 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:36,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 2611 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 889 Invalid, 0 Unknown, 452 Unchecked, 0.5s Time] [2021-11-20 06:25:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-11-20 06:25:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 518. [2021-11-20 06:25:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.1245136186770428) internal successors, (578), 517 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 578 transitions. [2021-11-20 06:25:36,192 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 578 transitions. Word has length 53 [2021-11-20 06:25:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:36,192 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 578 transitions. [2021-11-20 06:25:36,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 578 transitions. [2021-11-20 06:25:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 06:25:36,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:36,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:36,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:36,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-20 06:25:36,408 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:25:36,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash 796337809, now seen corresponding path program 4 times [2021-11-20 06:25:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431334728] [2021-11-20 06:25:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:36,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:37,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431334728] [2021-11-20 06:25:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431334728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:37,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146741856] [2021-11-20 06:25:37,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:25:37,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:37,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:37,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:37,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:25:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:25:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:25:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 06:25:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:37,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:25:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:25:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:25:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 06:25:37,754 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 06:25:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 06:25:37,857 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 06:25:37,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 06:25:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:25:37,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:43,361 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 632 treesize of output 616 [2021-11-20 06:25:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 22 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:25:44,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146741856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:44,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:44,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 17] total 46 [2021-11-20 06:25:44,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969797593] [2021-11-20 06:25:44,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:44,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 06:25:44,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 06:25:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1902, Unknown=4, NotChecked=0, Total=2070 [2021-11-20 06:25:44,671 INFO L87 Difference]: Start difference. First operand 518 states and 578 transitions. Second operand has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:47,709 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2021-11-20 06:25:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 06:25:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-20 06:25:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:47,712 INFO L225 Difference]: With dead ends: 941 [2021-11-20 06:25:47,712 INFO L226 Difference]: Without dead ends: 725 [2021-11-20 06:25:47,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1148, Invalid=6858, Unknown=4, NotChecked=0, Total=8010 [2021-11-20 06:25:47,713 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 521 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 660 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1129 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2021-11-20 06:25:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-20 06:25:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 600. [2021-11-20 06:25:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 596 states have (on average 1.1241610738255035) internal successors, (670), 599 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 670 transitions. [2021-11-20 06:25:47,724 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 670 transitions. Word has length 55 [2021-11-20 06:25:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:47,725 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 670 transitions. [2021-11-20 06:25:47,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 46 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 670 transitions. [2021-11-20 06:25:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:25:47,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:47,727 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:47,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 06:25:47,944 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:25:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 37563779, now seen corresponding path program 2 times [2021-11-20 06:25:47,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911638191] [2021-11-20 06:25:47,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:47,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:25:48,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911638191] [2021-11-20 06:25:48,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911638191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:48,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347140020] [2021-11-20 06:25:48,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:25:48,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:48,256 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:48,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:25:48,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:25:48,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:25:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:25:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:48,414 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:25:48,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:25:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:25:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:25:49,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:50,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:25:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:25:50,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347140020] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:50,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:50,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2021-11-20 06:25:50,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756599692] [2021-11-20 06:25:50,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:50,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 06:25:50,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:50,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 06:25:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:25:50,187 INFO L87 Difference]: Start difference. First operand 600 states and 670 transitions. Second operand has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:53,489 INFO L93 Difference]: Finished difference Result 901 states and 979 transitions. [2021-11-20 06:25:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 06:25:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-20 06:25:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:53,493 INFO L225 Difference]: With dead ends: 901 [2021-11-20 06:25:53,493 INFO L226 Difference]: Without dead ends: 870 [2021-11-20 06:25:53,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1392, Invalid=6090, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 06:25:53,498 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 726 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:53,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 706 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:25:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-20 06:25:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 582. [2021-11-20 06:25:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 578 states have (on average 1.1280276816608996) internal successors, (652), 581 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 652 transitions. [2021-11-20 06:25:53,513 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 652 transitions. Word has length 56 [2021-11-20 06:25:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:53,514 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 652 transitions. [2021-11-20 06:25:53,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.5853658536585367) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:25:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 652 transitions. [2021-11-20 06:25:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:25:53,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:53,516 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:53,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:53,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 06:25:53,744 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:25:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1540257805, now seen corresponding path program 13 times [2021-11-20 06:25:53,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:53,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745906086] [2021-11-20 06:25:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:53,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:54,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745906086] [2021-11-20 06:25:54,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745906086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:25:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098678488] [2021-11-20 06:25:54,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:25:54,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:25:54,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:25:54,188 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:25:54,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:25:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 06:25:54,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:25:54,376 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:25:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-11-20 06:25:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 66 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:56,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:25:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:25:58,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098678488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:25:58,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:25:58,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 62 [2021-11-20 06:25:58,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833107226] [2021-11-20 06:25:58,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:25:58,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 06:25:58,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 06:25:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3530, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:25:58,133 INFO L87 Difference]: Start difference. First operand 582 states and 652 transitions. Second operand has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:01,582 INFO L93 Difference]: Finished difference Result 1231 states and 1334 transitions. [2021-11-20 06:26:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 06:26:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 06:26:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:01,588 INFO L225 Difference]: With dead ends: 1231 [2021-11-20 06:26:01,588 INFO L226 Difference]: Without dead ends: 1203 [2021-11-20 06:26:01,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1560, Invalid=10650, Unknown=0, NotChecked=0, Total=12210 [2021-11-20 06:26:01,590 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 559 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 2496 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 857 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:01,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 2496 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1596 Invalid, 0 Unknown, 857 Unchecked, 0.9s Time] [2021-11-20 06:26:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-11-20 06:26:01,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 634. [2021-11-20 06:26:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 630 states have (on average 1.1222222222222222) internal successors, (707), 633 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 707 transitions. [2021-11-20 06:26:01,605 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 707 transitions. Word has length 57 [2021-11-20 06:26:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:01,606 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 707 transitions. [2021-11-20 06:26:01,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.661290322580645) internal successors, (165), 63 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 707 transitions. [2021-11-20 06:26:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:26:01,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:01,608 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:01,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:01,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:01,821 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1575967116, now seen corresponding path program 14 times [2021-11-20 06:26:01,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:01,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73606448] [2021-11-20 06:26:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:01,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:02,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:02,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73606448] [2021-11-20 06:26:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73606448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600526815] [2021-11-20 06:26:02,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:26:02,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:02,395 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:02,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:26:02,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:26:02,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:26:02,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:02,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:26:03,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:26:03,079 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-20 06:26:03,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-20 06:26:04,131 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:26:04,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 27 [2021-11-20 06:26:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:04,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:05,040 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-11-20 06:26:05,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2021-11-20 06:26:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:05,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600526815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:05,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:05,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 55 [2021-11-20 06:26:05,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318576901] [2021-11-20 06:26:05,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:05,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 06:26:05,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:05,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 06:26:05,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2702, Unknown=1, NotChecked=104, Total=2970 [2021-11-20 06:26:05,616 INFO L87 Difference]: Start difference. First operand 634 states and 707 transitions. Second operand has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:09,971 INFO L93 Difference]: Finished difference Result 1295 states and 1409 transitions. [2021-11-20 06:26:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:26:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:26:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:09,977 INFO L225 Difference]: With dead ends: 1295 [2021-11-20 06:26:09,977 INFO L226 Difference]: Without dead ends: 1230 [2021-11-20 06:26:09,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=243, Invalid=3918, Unknown=3, NotChecked=126, Total=4290 [2021-11-20 06:26:09,978 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 210 mSDsluCounter, 3545 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 3660 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:09,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 3660 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1261 Invalid, 0 Unknown, 752 Unchecked, 0.6s Time] [2021-11-20 06:26:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-20 06:26:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 678. [2021-11-20 06:26:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 674 states have (on average 1.1261127596439169) internal successors, (759), 677 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 759 transitions. [2021-11-20 06:26:09,999 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 759 transitions. Word has length 59 [2021-11-20 06:26:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 759 transitions. [2021-11-20 06:26:09,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 759 transitions. [2021-11-20 06:26:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:26:10,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:10,002 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:10,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:10,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 06:26:10,216 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash -105949010, now seen corresponding path program 5 times [2021-11-20 06:26:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668947845] [2021-11-20 06:26:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668947845] [2021-11-20 06:26:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668947845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160362720] [2021-11-20 06:26:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:26:10,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:10,486 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:10,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:26:10,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:26:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 06:26:10,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:10,694 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:26:10,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 06:26:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:11,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:11,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160362720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:11,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:11,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2021-11-20 06:26:11,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092395106] [2021-11-20 06:26:11,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:11,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:26:11,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:26:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:26:11,810 INFO L87 Difference]: Start difference. First operand 678 states and 759 transitions. Second operand has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:12,486 INFO L93 Difference]: Finished difference Result 848 states and 925 transitions. [2021-11-20 06:26:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:26:12,487 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-20 06:26:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:12,490 INFO L225 Difference]: With dead ends: 848 [2021-11-20 06:26:12,490 INFO L226 Difference]: Without dead ends: 848 [2021-11-20 06:26:12,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 06:26:12,491 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 291 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:12,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 427 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:26:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-20 06:26:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 727. [2021-11-20 06:26:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 723 states have (on average 1.1175656984785616) internal successors, (808), 726 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 808 transitions. [2021-11-20 06:26:12,508 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 808 transitions. Word has length 59 [2021-11-20 06:26:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:12,508 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 808 transitions. [2021-11-20 06:26:12,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.607142857142857) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 808 transitions. [2021-11-20 06:26:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:26:12,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:12,511 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:12,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:12,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 06:26:12,724 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2039963443, now seen corresponding path program 3 times [2021-11-20 06:26:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206158502] [2021-11-20 06:26:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:12,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:13,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206158502] [2021-11-20 06:26:13,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206158502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970697858] [2021-11-20 06:26:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:26:13,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:13,073 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:13,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:26:13,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:26:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:26:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:13,303 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:26:13,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:26:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:26:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:14,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:26:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970697858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:15,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:15,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2021-11-20 06:26:15,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904723949] [2021-11-20 06:26:15,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:15,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 06:26:15,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 06:26:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:26:15,298 INFO L87 Difference]: Start difference. First operand 727 states and 808 transitions. Second operand has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:19,322 INFO L93 Difference]: Finished difference Result 1232 states and 1324 transitions. [2021-11-20 06:26:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 06:26:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-20 06:26:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:19,328 INFO L225 Difference]: With dead ends: 1232 [2021-11-20 06:26:19,328 INFO L226 Difference]: Without dead ends: 1199 [2021-11-20 06:26:19,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1882, Invalid=8018, Unknown=0, NotChecked=0, Total=9900 [2021-11-20 06:26:19,329 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 832 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:19,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 895 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:26:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-11-20 06:26:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 695. [2021-11-20 06:26:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 691 states have (on average 1.1186685962373373) internal successors, (773), 694 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 773 transitions. [2021-11-20 06:26:19,345 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 773 transitions. Word has length 62 [2021-11-20 06:26:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:19,345 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 773 transitions. [2021-11-20 06:26:19,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.5106382978723403) internal successors, (165), 48 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 773 transitions. [2021-11-20 06:26:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:26:19,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:19,347 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:19,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-20 06:26:19,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:19,560 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1265880983, now seen corresponding path program 15 times [2021-11-20 06:26:19,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278593171] [2021-11-20 06:26:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:19,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278593171] [2021-11-20 06:26:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278593171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454529822] [2021-11-20 06:26:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:26:20,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:20,048 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:20,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:26:20,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-20 06:26:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-20 06:26:20,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:20,212 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:26:20,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:26:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:26:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:22,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:26:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 120 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454529822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:22,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 62 [2021-11-20 06:26:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772217998] [2021-11-20 06:26:22,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:22,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 06:26:22,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 06:26:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3389, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 06:26:22,429 INFO L87 Difference]: Start difference. First operand 695 states and 773 transitions. Second operand has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:24,625 INFO L93 Difference]: Finished difference Result 1598 states and 1721 transitions. [2021-11-20 06:26:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:26:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-20 06:26:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:24,631 INFO L225 Difference]: With dead ends: 1598 [2021-11-20 06:26:24,632 INFO L226 Difference]: Without dead ends: 1572 [2021-11-20 06:26:24,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1639, Invalid=6551, Unknown=0, NotChecked=0, Total=8190 [2021-11-20 06:26:24,633 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 971 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:24,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 1111 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:26:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-20 06:26:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 759. [2021-11-20 06:26:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 755 states have (on average 1.1125827814569536) internal successors, (840), 758 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 840 transitions. [2021-11-20 06:26:24,652 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 840 transitions. Word has length 63 [2021-11-20 06:26:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:24,652 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 840 transitions. [2021-11-20 06:26:24,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.8870967741935485) internal successors, (179), 63 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 840 transitions. [2021-11-20 06:26:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:26:24,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:24,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:24,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:24,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:24,880 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -749215359, now seen corresponding path program 1 times [2021-11-20 06:26:24,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:24,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367923023] [2021-11-20 06:26:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:24,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:25,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367923023] [2021-11-20 06:26:25,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367923023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239929387] [2021-11-20 06:26:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:25,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:25,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:25,207 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:25,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:26:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 06:26:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:25,309 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:26:25,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:26:25,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:26:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:26,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:27,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:26:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:26:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239929387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:27,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:27,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 48 [2021-11-20 06:26:27,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770281192] [2021-11-20 06:26:27,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:27,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:26:27,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:26:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1984, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:26:27,725 INFO L87 Difference]: Start difference. First operand 759 states and 840 transitions. Second operand has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:30,651 INFO L93 Difference]: Finished difference Result 1201 states and 1293 transitions. [2021-11-20 06:26:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:26:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-20 06:26:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:30,656 INFO L225 Difference]: With dead ends: 1201 [2021-11-20 06:26:30,656 INFO L226 Difference]: Without dead ends: 1201 [2021-11-20 06:26:30,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1907, Invalid=6465, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 06:26:30,658 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 788 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:30,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 422 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:26:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-11-20 06:26:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 771. [2021-11-20 06:26:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 767 states have (on average 1.1160365058670143) internal successors, (856), 770 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 856 transitions. [2021-11-20 06:26:30,670 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 856 transitions. Word has length 64 [2021-11-20 06:26:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:30,671 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 856 transitions. [2021-11-20 06:26:30,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 49 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 856 transitions. [2021-11-20 06:26:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:26:30,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:30,673 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:30,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:30,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 06:26:30,900 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1035879294, now seen corresponding path program 16 times [2021-11-20 06:26:30,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:30,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968083506] [2021-11-20 06:26:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:30,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 27 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:26:31,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968083506] [2021-11-20 06:26:31,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968083506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:31,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456154468] [2021-11-20 06:26:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:26:31,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:31,545 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:31,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 06:26:31,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:26:31,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:26:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:26:31,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:26:32,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 06:26:32,930 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-20 06:26:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-20 06:26:34,162 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-20 06:26:34,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 37 [2021-11-20 06:26:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 83 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:34,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:37,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-20 06:26:38,905 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 49 treesize of output 47 [2021-11-20 06:26:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 76 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456154468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:26:38,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:26:38,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 73 [2021-11-20 06:26:38,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837848747] [2021-11-20 06:26:38,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:38,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 06:26:38,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 06:26:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4798, Unknown=1, NotChecked=0, Total=5256 [2021-11-20 06:26:38,918 INFO L87 Difference]: Start difference. First operand 771 states and 856 transitions. Second operand has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:42,799 INFO L93 Difference]: Finished difference Result 1973 states and 2115 transitions. [2021-11-20 06:26:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-20 06:26:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 06:26:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:42,807 INFO L225 Difference]: With dead ends: 1973 [2021-11-20 06:26:42,807 INFO L226 Difference]: Without dead ends: 1879 [2021-11-20 06:26:42,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2661 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=925, Invalid=10846, Unknown=1, NotChecked=0, Total=11772 [2021-11-20 06:26:42,809 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 294 mSDsluCounter, 4407 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 4056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:42,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 4554 Invalid, 4056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3187 Invalid, 0 Unknown, 813 Unchecked, 1.8s Time] [2021-11-20 06:26:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-11-20 06:26:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 817. [2021-11-20 06:26:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 813 states have (on average 1.120541205412054) internal successors, (911), 816 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 911 transitions. [2021-11-20 06:26:42,829 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 911 transitions. Word has length 65 [2021-11-20 06:26:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:42,830 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 911 transitions. [2021-11-20 06:26:42,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 911 transitions. [2021-11-20 06:26:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:26:42,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:42,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:42,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:43,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-20 06:26:43,056 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash 229195360, now seen corresponding path program 6 times [2021-11-20 06:26:43,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56646589] [2021-11-20 06:26:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:43,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:43,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56646589] [2021-11-20 06:26:43,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56646589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186133616] [2021-11-20 06:26:43,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:26:43,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:43,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:43,960 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:43,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 06:26:44,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 06:26:44,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-20 06:26:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:44,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:26:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:26:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 06:26:45,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-20 06:26:45,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 06:26:45,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-11-20 06:26:46,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:26:46,067 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 06:26:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-20 06:26:46,554 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-11-20 06:26:46,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 31 [2021-11-20 06:26:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:26:46,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:26:48,157 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:26:48,158 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 122431 treesize of output 119911 [2021-11-20 06:26:55,958 WARN L227 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 413 DAG size of output: 402 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:26:55,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:26:55,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:26:55,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-20 06:26:55,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022930056] [2021-11-20 06:26:55,970 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:26:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:26:55,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:26:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3096, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 06:26:55,971 INFO L87 Difference]: Start difference. First operand 817 states and 911 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:57,893 INFO L93 Difference]: Finished difference Result 891 states and 982 transitions. [2021-11-20 06:26:57,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:26:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 06:26:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:57,897 INFO L225 Difference]: With dead ends: 891 [2021-11-20 06:26:57,897 INFO L226 Difference]: Without dead ends: 794 [2021-11-20 06:26:57,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=517, Invalid=5183, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 06:26:57,898 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 116 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 508 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:26:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-20 06:26:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 794. [2021-11-20 06:26:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 790 states have (on average 1.1177215189873417) internal successors, (883), 793 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 883 transitions. [2021-11-20 06:26:57,908 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 883 transitions. Word has length 65 [2021-11-20 06:26:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:57,908 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 883 transitions. [2021-11-20 06:26:57,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:26:57,909 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 883 transitions. [2021-11-20 06:26:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:26:57,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:57,911 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:57,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:26:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:58,136 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:26:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1839858857, now seen corresponding path program 4 times [2021-11-20 06:26:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373391868] [2021-11-20 06:26:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:58,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:26:58,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373391868] [2021-11-20 06:26:58,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373391868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:26:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536720702] [2021-11-20 06:26:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:26:58,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:26:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:58,526 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:26:58,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 06:26:58,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:26:58,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:26:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 06:26:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:26:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:26:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 06:26:59,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 06:26:59,113 INFO L354 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2021-11-20 06:26:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:26:59,611 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-20 06:26:59,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 27 [2021-11-20 06:26:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:26:59,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:01,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-20 06:27:01,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 06:27:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:27:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536720702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:01,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 48 [2021-11-20 06:27:01,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338089011] [2021-11-20 06:27:01,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:01,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 06:27:01,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 06:27:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:27:01,950 INFO L87 Difference]: Start difference. First operand 794 states and 883 transitions. Second operand has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:04,980 INFO L93 Difference]: Finished difference Result 987 states and 1079 transitions. [2021-11-20 06:27:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 06:27:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:27:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:04,985 INFO L225 Difference]: With dead ends: 987 [2021-11-20 06:27:04,985 INFO L226 Difference]: Without dead ends: 973 [2021-11-20 06:27:04,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1108, Invalid=8594, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 06:27:04,986 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 147 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:04,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 442 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 623 Invalid, 0 Unknown, 325 Unchecked, 0.4s Time] [2021-11-20 06:27:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-20 06:27:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 695. [2021-11-20 06:27:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 692 states have (on average 1.111271676300578) internal successors, (769), 694 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 769 transitions. [2021-11-20 06:27:05,000 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 769 transitions. Word has length 68 [2021-11-20 06:27:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:05,000 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 769 transitions. [2021-11-20 06:27:05,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 769 transitions. [2021-11-20 06:27:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 06:27:05,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:05,003 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:05,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:05,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-20 06:27:05,228 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:27:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1839867893, now seen corresponding path program 2 times [2021-11-20 06:27:05,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:05,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644809215] [2021-11-20 06:27:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:05,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:27:05,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644809215] [2021-11-20 06:27:05,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644809215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987349323] [2021-11-20 06:27:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:05,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:05,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:05,766 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:05,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 06:27:05,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:05,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 06:27:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:05,910 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:05,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:27:05,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:27:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:27:07,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:08,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:27:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:27:08,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987349323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:08,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:08,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2021-11-20 06:27:08,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459413339] [2021-11-20 06:27:08,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:08,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 06:27:08,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 06:27:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2429, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:27:08,265 INFO L87 Difference]: Start difference. First operand 695 states and 769 transitions. Second operand has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:10,244 INFO L93 Difference]: Finished difference Result 1120 states and 1203 transitions. [2021-11-20 06:27:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:27:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 06:27:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:10,249 INFO L225 Difference]: With dead ends: 1120 [2021-11-20 06:27:10,249 INFO L226 Difference]: Without dead ends: 1089 [2021-11-20 06:27:10,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1206, Invalid=4956, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 06:27:10,250 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 549 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:10,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 699 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:27:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-20 06:27:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 706. [2021-11-20 06:27:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 703 states have (on average 1.1166429587482218) internal successors, (785), 705 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 785 transitions. [2021-11-20 06:27:10,261 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 785 transitions. Word has length 68 [2021-11-20 06:27:10,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:10,261 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 785 transitions. [2021-11-20 06:27:10,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.5) internal successors, (182), 53 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 785 transitions. [2021-11-20 06:27:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:27:10,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:10,263 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:10,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:10,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:10,464 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:27:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -735626849, now seen corresponding path program 17 times [2021-11-20 06:27:10,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:10,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949333271] [2021-11-20 06:27:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:10,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:10,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949333271] [2021-11-20 06:27:10,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949333271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967646374] [2021-11-20 06:27:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:27:10,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:11,000 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:11,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 06:27:11,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 06:27:11,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:11,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 06:27:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:11,164 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:11,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 06:27:11,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 06:27:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 120 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:12,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:27:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 153 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:13,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967646374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:13,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:13,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 64 [2021-11-20 06:27:13,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847637183] [2021-11-20 06:27:13,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:13,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 06:27:13,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 06:27:13,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3635, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 06:27:13,851 INFO L87 Difference]: Start difference. First operand 706 states and 785 transitions. Second operand has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:15,981 INFO L93 Difference]: Finished difference Result 1686 states and 1798 transitions. [2021-11-20 06:27:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:27:15,982 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 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 69 [2021-11-20 06:27:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:15,989 INFO L225 Difference]: With dead ends: 1686 [2021-11-20 06:27:15,989 INFO L226 Difference]: Without dead ends: 1670 [2021-11-20 06:27:15,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1424, Invalid=6058, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 06:27:15,990 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 665 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1922 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:15,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1922 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2599 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:27:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-11-20 06:27:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 741. [2021-11-20 06:27:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 738 states have (on average 1.113821138211382) internal successors, (822), 740 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 822 transitions. [2021-11-20 06:27:16,007 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 822 transitions. Word has length 69 [2021-11-20 06:27:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 822 transitions. [2021-11-20 06:27:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.03125) internal successors, (194), 65 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 822 transitions. [2021-11-20 06:27:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:27:16,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:16,010 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:16,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:16,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:16,220 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-20 06:27:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash -234579075, now seen corresponding path program 7 times [2021-11-20 06:27:16,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057603341] [2021-11-20 06:27:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:16,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:17,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057603341] [2021-11-20 06:27:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057603341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970129656] [2021-11-20 06:27:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:27:17,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:17,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:17,063 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:17,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04a47671-4af5-4893-a6c1-206990b8d478/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 06:27:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-20 06:27:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:17,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:27:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:27:17,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:27:17,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:27:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:27:17,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:27:18,205 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:27:18,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-20 06:27:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:27:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:27:18,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:18,847 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) |c_ULTIMATE.start_cstrncat_~s2#1.offset|) 0)) is different from false [2021-11-20 06:27:51,332 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrncat_#t~mem5#1| Int) (|v_ULTIMATE.start_cstrncat_#t~mem5#1_142| Int) (|ULTIMATE.start_cstrncat_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_369| Int) (|v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| Int) (|v_ULTIMATE.start_cstrncat_#t~mem5#1_139| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |ULTIMATE.start_cstrncat_~s~0#1.offset| |ULTIMATE.start_cstrncat_#t~mem5#1|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_369| |v_ULTIMATE.start_cstrncat_#t~mem5#1_142|) |v_ULTIMATE.start_cstrncat_~s~0#1.offset_367| |v_ULTIMATE.start_cstrncat_#t~mem5#1_139|)) |c_ULTIMATE.start_cstrncat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s2#1.offset| 2)) 0)) is different from false [2021-11-20 06:28:09,892 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 6266 treesize of output 6170