./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:20:00,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:20:00,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:20:00,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:20:00,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:20:00,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:20:00,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:20:00,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:20:00,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:20:00,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:20:00,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:20:00,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:20:00,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:20:00,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:20:00,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:20:00,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:20:00,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:20:00,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:20:00,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:20:00,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:20:00,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:20:00,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:20:00,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:20:00,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:20:00,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:20:00,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:20:00,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:20:00,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:20:00,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:20:00,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:20:00,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:20:00,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:20:00,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:20:00,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:20:00,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:20:00,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:20:00,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:20:00,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:20:00,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:20:00,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:20:00,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:20:00,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 16:20:00,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:20:00,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:20:00,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:20:00,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:20:00,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:20:00,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:20:00,974 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:20:00,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:20:00,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:20:00,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:20:00,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:20:00,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:20:00,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:20:00,976 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:20:00,976 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:20:00,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:20:00,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:20:00,977 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:20:00,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:20:00,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:20:00,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:20:00,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:20:00,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:20:00,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:20:00,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:20:00,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:20:00,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:20:00,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:20:00,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:20:00,980 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_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45a8f33f173b19ce98ca13bb7c3a70605cebce85501309e729b51c966620adf7 [2021-11-22 16:20:01,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:20:01,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:20:01,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:20:01,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:20:01,248 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:20:01,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-11-22 16:20:01,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/data/88dfd1538/a506c90b773b40299b6f4055a2c294fa/FLAG929ac888d [2021-11-22 16:20:01,916 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:20:01,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2021-11-22 16:20:01,929 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/data/88dfd1538/a506c90b773b40299b6f4055a2c294fa/FLAG929ac888d [2021-11-22 16:20:02,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/data/88dfd1538/a506c90b773b40299b6f4055a2c294fa [2021-11-22 16:20:02,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:20:02,180 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:20:02,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:02,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:20:02,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:20:02,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff6d53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02, skipping insertion in model container [2021-11-22 16:20:02,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:20:02,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:20:02,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:02,592 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:20:02,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:20:02,665 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:20:02,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02 WrapperNode [2021-11-22 16:20:02,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:20:02,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:02,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:20:02,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:20:02,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,714 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-11-22 16:20:02,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:20:02,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:20:02,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:20:02,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:20:02,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:20:02,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:20:02,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:20:02,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:20:02,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (1/1) ... [2021-11-22 16:20:02,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:20:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:02,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:20:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:20:02,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:20:02,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:20:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:20:02,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:20:02,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:20:02,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:20:02,930 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:20:02,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:20:03,266 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:20:03,281 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:20:03,281 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 16:20:03,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:03 BoogieIcfgContainer [2021-11-22 16:20:03,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:20:03,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:20:03,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:20:03,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:20:03,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:20:02" (1/3) ... [2021-11-22 16:20:03,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ff3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:20:03, skipping insertion in model container [2021-11-22 16:20:03,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:20:02" (2/3) ... [2021-11-22 16:20:03,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ff3db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:20:03, skipping insertion in model container [2021-11-22 16:20:03,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:20:03" (3/3) ... [2021-11-22 16:20:03,298 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2021-11-22 16:20:03,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:20:03,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-22 16:20:03,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:20:03,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:20:03,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-22 16:20:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:03,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-22 16:20:03,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427710127] [2021-11-22 16:20:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427710127] [2021-11-22 16:20:03,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427710127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:03,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727399773] [2021-11-22 16:20:03,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:03,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:03,634 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,696 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-22 16:20:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-22 16:20:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,707 INFO L225 Difference]: With dead ends: 100 [2021-11-22 16:20:03,707 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 16:20:03,709 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 [2021-11-22 16:20:03,713 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 16:20:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-11-22 16:20:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-22 16:20:03,751 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-11-22 16:20:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,752 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-22 16:20:03,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-22 16:20:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:03,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:20:03,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-22 16:20:03,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465068325] [2021-11-22 16:20:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:03,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:03,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465068325] [2021-11-22 16:20:03,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465068325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:03,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833344171] [2021-11-22 16:20:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:03,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:20:03,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:03,874 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:03,947 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-22 16:20:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:03,952 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 [2021-11-22 16:20:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:03,953 INFO L225 Difference]: With dead ends: 53 [2021-11-22 16:20:03,953 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 16:20:03,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:03,955 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:03,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 16:20:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-22 16:20:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 16:20:03,969 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-11-22 16:20:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:03,969 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 16:20:03,969 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) [2021-11-22 16:20:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 16:20:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:20:03,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:03,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:03,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:20:03,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-22 16:20:03,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:03,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722280126] [2021-11-22 16:20:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:03,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722280126] [2021-11-22 16:20:04,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722280126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:04,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117389755] [2021-11-22 16:20:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:04,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,067 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,224 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-11-22 16:20:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-22 16:20:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,226 INFO L225 Difference]: With dead ends: 97 [2021-11-22 16:20:04,227 INFO L226 Difference]: Without dead ends: 97 [2021-11-22 16:20:04,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:04,229 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-22 16:20:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-11-22 16:20:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-22 16:20:04,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2021-11-22 16:20:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,238 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-22 16:20:04,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-22 16:20:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:04,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:20:04,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-22 16:20:04,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634113715] [2021-11-22 16:20:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634113715] [2021-11-22 16:20:04,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634113715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:04,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446344542] [2021-11-22 16:20:04,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:04,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:04,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,310 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,358 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-11-22 16:20:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-22 16:20:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,361 INFO L225 Difference]: With dead ends: 54 [2021-11-22 16:20:04,361 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 16:20:04,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,374 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 16:20:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-22 16:20:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-22 16:20:04,383 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2021-11-22 16:20:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,383 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-22 16:20:04,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-22 16:20:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:04,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:20:04,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,392 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-22 16:20:04,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418328720] [2021-11-22 16:20:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418328720] [2021-11-22 16:20:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418328720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:04,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358336246] [2021-11-22 16:20:04,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:04,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,464 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,497 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-22 16:20:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:04,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-22 16:20:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,501 INFO L225 Difference]: With dead ends: 98 [2021-11-22 16:20:04,501 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 16:20:04,501 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 [2021-11-22 16:20:04,503 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 16:20:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-22 16:20:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-22 16:20:04,511 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2021-11-22 16:20:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,512 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-22 16:20:04,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-22 16:20:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:04,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:20:04,520 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-22 16:20:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911333346] [2021-11-22 16:20:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911333346] [2021-11-22 16:20:04,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911333346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:20:04,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087968776] [2021-11-22 16:20:04,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:20:04,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:04,581 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,609 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-11-22 16:20:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:04,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-22 16:20:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,611 INFO L225 Difference]: With dead ends: 63 [2021-11-22 16:20:04,611 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 16:20:04,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:04,612 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 16:20:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-22 16:20:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-11-22 16:20:04,619 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-11-22 16:20:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-11-22 16:20:04,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-11-22 16:20:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-22 16:20:04,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:20:04,621 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-22 16:20:04,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932299395] [2021-11-22 16:20:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932299395] [2021-11-22 16:20:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932299395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:04,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58383546] [2021-11-22 16:20:04,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:04,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:04,706 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:04,820 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-11-22 16:20:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-22 16:20:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:04,822 INFO L225 Difference]: With dead ends: 98 [2021-11-22 16:20:04,822 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 16:20:04,822 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 [2021-11-22 16:20:04,824 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:04,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 94 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 16:20:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2021-11-22 16:20:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-11-22 16:20:04,852 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2021-11-22 16:20:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:04,852 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-11-22 16:20:04,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-11-22 16:20:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:20:04,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:04,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:04,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 16:20:04,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-22 16:20:04,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:04,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283494743] [2021-11-22 16:20:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:04,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:04,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283494743] [2021-11-22 16:20:04,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283494743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:04,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:04,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:04,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154800847] [2021-11-22 16:20:04,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:04,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:04,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:04,965 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:05,015 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-11-22 16:20:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-22 16:20:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:05,017 INFO L225 Difference]: With dead ends: 64 [2021-11-22 16:20:05,017 INFO L226 Difference]: Without dead ends: 64 [2021-11-22 16:20:05,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:05,019 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:05,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-22 16:20:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-22 16:20:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-22 16:20:05,024 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2021-11-22 16:20:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:05,024 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-22 16:20:05,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-22 16:20:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 16:20:05,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:05,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:05,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 16:20:05,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-22 16:20:05,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:05,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644056003] [2021-11-22 16:20:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:05,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644056003] [2021-11-22 16:20:05,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644056003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114297173] [2021-11-22 16:20:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:05,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:05,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:05,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:20:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:20:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:05,313 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:20:05,314 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 [2021-11-22 16:20:05,322 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 [2021-11-22 16:20:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:05,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114297173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:05,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:05,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-22 16:20:05,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257007599] [2021-11-22 16:20:05,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:05,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:20:05,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:05,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:20:05,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:05,594 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:05,831 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2021-11-22 16:20:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:20:05,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 16:20:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:05,833 INFO L225 Difference]: With dead ends: 149 [2021-11-22 16:20:05,833 INFO L226 Difference]: Without dead ends: 149 [2021-11-22 16:20:05,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:20:05,834 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 248 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:05,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 278 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-22 16:20:05,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2021-11-22 16:20:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-22 16:20:05,839 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2021-11-22 16:20:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-22 16:20:05,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-22 16:20:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 16:20:05,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:05,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:05,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:06,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:06,042 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:06,043 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2021-11-22 16:20:06,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:06,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316577051] [2021-11-22 16:20:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316577051] [2021-11-22 16:20:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316577051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:06,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:06,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:06,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406096273] [2021-11-22 16:20:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:06,089 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:06,126 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-22 16:20:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 16:20:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:06,128 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:20:06,128 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 16:20:06,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:06,129 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:06,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 16:20:06,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-22 16:20:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-22 16:20:06,134 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2021-11-22 16:20:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:06,134 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-22 16:20:06,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-22 16:20:06,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 16:20:06,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:06,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:06,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:20:06,136 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-11-22 16:20:06,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:06,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617185093] [2021-11-22 16:20:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617185093] [2021-11-22 16:20:06,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617185093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:06,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:06,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:20:06,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737989728] [2021-11-22 16:20:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:06,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:20:06,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:20:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:20:06,213 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:06,300 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-22 16:20:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 16:20:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:06,302 INFO L225 Difference]: With dead ends: 80 [2021-11-22 16:20:06,302 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 16:20:06,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:20:06,305 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:06,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 65 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 16:20:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-11-22 16:20:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-22 16:20:06,312 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2021-11-22 16:20:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:06,312 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-22 16:20:06,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-22 16:20:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:20:06,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:06,316 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:06,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:20:06,317 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-22 16:20:06,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:06,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562278155] [2021-11-22 16:20:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562278155] [2021-11-22 16:20:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562278155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:06,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812842397] [2021-11-22 16:20:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:06,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:06,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:06,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:20:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:20:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:06,526 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:06,526 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 9 treesize of output 15 [2021-11-22 16:20:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:06,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812842397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:06,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-22 16:20:06,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206967499] [2021-11-22 16:20:06,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:06,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:20:06,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:20:06,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:20:06,844 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,054 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-11-22 16:20:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:20:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 16:20:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,056 INFO L225 Difference]: With dead ends: 124 [2021-11-22 16:20:07,056 INFO L226 Difference]: Without dead ends: 124 [2021-11-22 16:20:07,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:20:07,057 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 175 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 221 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-22 16:20:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2021-11-22 16:20:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-22 16:20:07,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2021-11-22 16:20:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,063 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-22 16:20:07,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-22 16:20:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:20:07,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:07,265 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2021-11-22 16:20:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457162242] [2021-11-22 16:20:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457162242] [2021-11-22 16:20:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457162242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:07,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100127955] [2021-11-22 16:20:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:20:07,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:20:07,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:07,341 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,369 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-22 16:20:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:20:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:20:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,371 INFO L225 Difference]: With dead ends: 56 [2021-11-22 16:20:07,371 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 16:20:07,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:20:07,373 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 16:20:07,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-22 16:20:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-22 16:20:07,379 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-11-22 16:20:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,381 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-22 16:20:07,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-22 16:20:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:20:07,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:20:07,385 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2021-11-22 16:20:07,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622808185] [2021-11-22 16:20:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622808185] [2021-11-22 16:20:07,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622808185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:20:07,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109994864] [2021-11-22 16:20:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:20:07,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:20:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:20:07,455 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,509 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-22 16:20:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:20:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:20:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,511 INFO L225 Difference]: With dead ends: 50 [2021-11-22 16:20:07,511 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 16:20:07,511 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 [2021-11-22 16:20:07,512 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 16:20:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-22 16:20:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-22 16:20:07,515 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2021-11-22 16:20:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,515 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-22 16:20:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-22 16:20:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:20:07,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:20:07,519 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2021-11-22 16:20:07,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60901711] [2021-11-22 16:20:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60901711] [2021-11-22 16:20:07,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60901711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:20:07,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795019508] [2021-11-22 16:20:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:20:07,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:20:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:20:07,614 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,694 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-11-22 16:20:07,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:20:07,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:20:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,696 INFO L225 Difference]: With dead ends: 62 [2021-11-22 16:20:07,696 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 16:20:07,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:07,700 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 16:20:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-11-22 16:20:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-22 16:20:07,705 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2021-11-22 16:20:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,705 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-22 16:20:07,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-22 16:20:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:20:07,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:07,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:20:07,707 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2021-11-22 16:20:07,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739566844] [2021-11-22 16:20:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:07,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739566844] [2021-11-22 16:20:07,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739566844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:20:07,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207777298] [2021-11-22 16:20:07,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:20:07,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:20:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:07,756 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:07,764 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-22 16:20:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:20:07,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:20:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:07,765 INFO L225 Difference]: With dead ends: 59 [2021-11-22 16:20:07,765 INFO L226 Difference]: Without dead ends: 59 [2021-11-22 16:20:07,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:20:07,767 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:07,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:07,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-22 16:20:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-22 16:20:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-22 16:20:07,772 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2021-11-22 16:20:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:07,772 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-22 16:20:07,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-22 16:20:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 16:20:07,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:07,774 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] [2021-11-22 16:20:07,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:20:07,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:07,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2021-11-22 16:20:07,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:07,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302946932] [2021-11-22 16:20:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:07,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:07,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:07,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302946932] [2021-11-22 16:20:07,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302946932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:07,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:07,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:20:07,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068103246] [2021-11-22 16:20:07,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:07,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:20:07,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:20:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:20:07,931 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,024 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-22 16:20:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:20:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 16:20:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,025 INFO L225 Difference]: With dead ends: 71 [2021-11-22 16:20:08,025 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 16:20:08,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:20:08,026 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 153 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:20:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 16:20:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-22 16:20:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-22 16:20:08,032 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2021-11-22 16:20:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,032 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-22 16:20:08,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-22 16:20:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 16:20:08,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,034 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] [2021-11-22 16:20:08,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:20:08,034 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2021-11-22 16:20:08,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82513515] [2021-11-22 16:20:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:08,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82513515] [2021-11-22 16:20:08,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82513515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:08,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-22 16:20:08,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884512855] [2021-11-22 16:20:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:08,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:20:08,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:20:08,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:20:08,220 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,325 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-22 16:20:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:20:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 16:20:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,326 INFO L225 Difference]: With dead ends: 74 [2021-11-22 16:20:08,326 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 16:20:08,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:20:08,327 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 16:20:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-22 16:20:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-11-22 16:20:08,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2021-11-22 16:20:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,330 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-11-22 16:20:08,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-11-22 16:20:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 16:20:08,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:08,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 16:20:08,331 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2021-11-22 16:20:08,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775264134] [2021-11-22 16:20:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:08,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775264134] [2021-11-22 16:20:08,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775264134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:08,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:08,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:20:08,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991960844] [2021-11-22 16:20:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:08,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:20:08,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:20:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:20:08,468 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,608 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-22 16:20:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:20:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 16:20:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,609 INFO L225 Difference]: With dead ends: 75 [2021-11-22 16:20:08,609 INFO L226 Difference]: Without dead ends: 75 [2021-11-22 16:20:08,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:20:08,610 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 217 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-22 16:20:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-11-22 16:20:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-11-22 16:20:08,613 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2021-11-22 16:20:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,613 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-11-22 16:20:08,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-11-22 16:20:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 16:20:08,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:08,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 16:20:08,615 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2021-11-22 16:20:08,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038360228] [2021-11-22 16:20:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:08,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038360228] [2021-11-22 16:20:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038360228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:08,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 16:20:08,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6794675] [2021-11-22 16:20:08,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:08,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:20:08,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:20:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:20:08,761 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:08,971 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2021-11-22 16:20:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:20:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 16:20:08,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:08,972 INFO L225 Difference]: With dead ends: 96 [2021-11-22 16:20:08,973 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 16:20:08,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:20:08,974 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:08,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 195 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 16:20:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2021-11-22 16:20:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-11-22 16:20:08,978 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2021-11-22 16:20:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:08,978 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-11-22 16:20:08,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-11-22 16:20:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:20:08,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:08,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 16:20:08,980 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2021-11-22 16:20:08,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:08,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821395922] [2021-11-22 16:20:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:08,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:09,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821395922] [2021-11-22 16:20:09,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821395922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:20:09,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:20:09,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-22 16:20:09,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094870767] [2021-11-22 16:20:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:20:09,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:20:09,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:20:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:20:09,073 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:09,245 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-11-22 16:20:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:20:09,246 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 [2021-11-22 16:20:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:09,247 INFO L225 Difference]: With dead ends: 75 [2021-11-22 16:20:09,247 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 16:20:09,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:20:09,248 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:09,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 142 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 16:20:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-11-22 16:20:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-11-22 16:20:09,251 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2021-11-22 16:20:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-11-22 16:20:09,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-11-22 16:20:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:20:09,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:09,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:09,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 16:20:09,252 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2021-11-22 16:20:09,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:09,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393223450] [2021-11-22 16:20:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:09,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:09,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393223450] [2021-11-22 16:20:09,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393223450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931381793] [2021-11-22 16:20:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:09,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:09,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:09,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:20:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 16:20:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:09,469 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:09,470 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 [2021-11-22 16:20:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:09,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:09,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931381793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:09,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:10,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2021-11-22 16:20:10,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218269565] [2021-11-22 16:20:10,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:10,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:20:10,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:20:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:20:10,002 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:10,266 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-22 16:20:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:20:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 16:20:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:10,268 INFO L225 Difference]: With dead ends: 69 [2021-11-22 16:20:10,268 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 16:20:10,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:20:10,269 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 279 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:10,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 151 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 16:20:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-11-22 16:20:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-22 16:20:10,272 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2021-11-22 16:20:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:10,272 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-22 16:20:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-22 16:20:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:20:10,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:10,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:10,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:10,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-22 16:20:10,474 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2021-11-22 16:20:10,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:10,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846979796] [2021-11-22 16:20:10,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:10,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:10,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:10,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846979796] [2021-11-22 16:20:10,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846979796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:10,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263556654] [2021-11-22 16:20:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:10,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:10,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:10,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:20:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 16:20:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:10,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:10,999 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 [2021-11-22 16:20:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:11,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263556654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:11,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:11,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-22 16:20:11,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353758175] [2021-11-22 16:20:11,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:11,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:20:11,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:20:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:20:11,049 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:11,222 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-22 16:20:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:20:11,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 16:20:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:11,223 INFO L225 Difference]: With dead ends: 86 [2021-11-22 16:20:11,223 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 16:20:11,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:20:11,225 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:11,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 134 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:20:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 16:20:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-11-22 16:20:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-11-22 16:20:11,228 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2021-11-22 16:20:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:11,228 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-11-22 16:20:11,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-11-22 16:20:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:20:11,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:11,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:11,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:11,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 16:20:11,429 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:11,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2021-11-22 16:20:11,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:11,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568879351] [2021-11-22 16:20:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:11,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:11,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568879351] [2021-11-22 16:20:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568879351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101204381] [2021-11-22 16:20:11,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:11,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:11,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:11,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:20:11,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:20:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 16:20:11,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:11,819 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:11,819 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 [2021-11-22 16:20:11,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:20:12,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-22 16:20:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:20:12,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:13,092 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 [2021-11-22 16:20:13,099 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 [2021-11-22 16:20:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:20:13,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101204381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:13,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:13,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-22 16:20:13,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267334748] [2021-11-22 16:20:13,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:13,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 16:20:13,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 16:20:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 16:20:13,326 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:15,077 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2021-11-22 16:20:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 16:20:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:20:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:15,079 INFO L225 Difference]: With dead ends: 157 [2021-11-22 16:20:15,079 INFO L226 Difference]: Without dead ends: 151 [2021-11-22 16:20:15,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=702, Invalid=3204, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 16:20:15,082 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 488 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:15,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 407 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 586 Invalid, 0 Unknown, 119 Unchecked, 0.4s Time] [2021-11-22 16:20:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-22 16:20:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 118. [2021-11-22 16:20:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 117 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2021-11-22 16:20:15,087 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 36 [2021-11-22 16:20:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:15,087 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2021-11-22 16:20:15,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 35 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2021-11-22 16:20:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 16:20:15,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:15,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:15,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:15,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:15,301 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2021-11-22 16:20:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:15,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844151671] [2021-11-22 16:20:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:15,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:15,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844151671] [2021-11-22 16:20:15,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844151671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532718157] [2021-11-22 16:20:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:15,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:15,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:20:15,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:20:15,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-22 16:20:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:15,672 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 [2021-11-22 16:20:15,892 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 [2021-11-22 16:20:15,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-22 16:20:17,827 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-22 16:20:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 37 [2021-11-22 16:20:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:17,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:21,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:21,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 124 [2021-11-22 16:20:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-22 16:20:21,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:21,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:21,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 171 treesize of output 161 [2021-11-22 16:20:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532718157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:21,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:21,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 19] total 45 [2021-11-22 16:20:21,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344880911] [2021-11-22 16:20:21,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:21,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-22 16:20:21,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:21,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-22 16:20:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 16:20:21,638 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:22,693 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2021-11-22 16:20:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:20:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-22 16:20:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:22,695 INFO L225 Difference]: With dead ends: 171 [2021-11-22 16:20:22,695 INFO L226 Difference]: Without dead ends: 148 [2021-11-22 16:20:22,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=327, Invalid=3213, Unknown=0, NotChecked=0, Total=3540 [2021-11-22 16:20:22,698 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:22,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 357 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-22 16:20:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-22 16:20:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2021-11-22 16:20:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 144 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-11-22 16:20:22,703 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 46 [2021-11-22 16:20:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:22,703 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-11-22 16:20:22,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-11-22 16:20:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 16:20:22,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:22,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:22,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:22,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:22,920 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:22,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1006205749, now seen corresponding path program 3 times [2021-11-22 16:20:22,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:22,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388724301] [2021-11-22 16:20:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:22,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:23,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:23,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388724301] [2021-11-22 16:20:23,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388724301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:23,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644404619] [2021-11-22 16:20:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:20:23,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:23,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:23,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:20:23,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 16:20:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 16:20:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:23,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-22 16:20:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:23,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644404619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:23,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:23,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-11-22 16:20:23,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586091232] [2021-11-22 16:20:23,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:23,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 16:20:23,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 16:20:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:20:23,683 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:23,998 INFO L93 Difference]: Finished difference Result 280 states and 304 transitions. [2021-11-22 16:20:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:20:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-22 16:20:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:24,000 INFO L225 Difference]: With dead ends: 280 [2021-11-22 16:20:24,000 INFO L226 Difference]: Without dead ends: 280 [2021-11-22 16:20:24,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:20:24,001 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 346 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:24,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 328 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-22 16:20:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 197. [2021-11-22 16:20:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.1025641025641026) internal successors, (215), 196 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 215 transitions. [2021-11-22 16:20:24,011 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 215 transitions. Word has length 50 [2021-11-22 16:20:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:24,011 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 215 transitions. [2021-11-22 16:20:24,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 215 transitions. [2021-11-22 16:20:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 16:20:24,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:24,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:24,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:24,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:24,234 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -847276983, now seen corresponding path program 1 times [2021-11-22 16:20:24,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:24,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192721490] [2021-11-22 16:20:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:24,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:20:24,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192721490] [2021-11-22 16:20:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192721490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:24,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581907572] [2021-11-22 16:20:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:24,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:24,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:24,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:20:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-22 16:20:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:24,856 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 [2021-11-22 16:20:24,907 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:20:24,907 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 [2021-11-22 16:20:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:27,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:31,080 INFO L354 Elim1Store]: treesize reduction 57, result has 38.0 percent of original size [2021-11-22 16:20:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1275 treesize of output 997 [2021-11-22 16:20:31,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 891 treesize of output 843 [2021-11-22 16:20:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:31,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:31,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:31,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 138 [2021-11-22 16:20:31,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:31,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:20:31,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:20:31,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 968 treesize of output 956 [2021-11-22 16:20:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:20:46,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581907572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:46,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23, 26] total 55 [2021-11-22 16:20:46,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734444987] [2021-11-22 16:20:46,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 16:20:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 16:20:46,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2608, Unknown=1, NotChecked=0, Total=2970 [2021-11-22 16:20:46,253 INFO L87 Difference]: Start difference. First operand 197 states and 215 transitions. Second operand has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:46,963 INFO L93 Difference]: Finished difference Result 222 states and 240 transitions. [2021-11-22 16:20:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:20:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 16:20:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:46,965 INFO L225 Difference]: With dead ends: 222 [2021-11-22 16:20:46,965 INFO L226 Difference]: Without dead ends: 177 [2021-11-22 16:20:46,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=438, Invalid=3343, Unknown=1, NotChecked=0, Total=3782 [2021-11-22 16:20:46,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:46,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 437 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 347 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2021-11-22 16:20:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-22 16:20:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2021-11-22 16:20:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.1046511627906976) internal successors, (190), 173 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2021-11-22 16:20:46,973 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 56 [2021-11-22 16:20:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2021-11-22 16:20:46,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2021-11-22 16:20:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:20:46,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:46,975 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:47,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:47,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 16:20:47,200 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:47,201 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 4 times [2021-11-22 16:20:47,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242492550] [2021-11-22 16:20:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:47,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:47,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242492550] [2021-11-22 16:20:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242492550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837752139] [2021-11-22 16:20:47,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:20:47,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:47,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:20:48,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:20:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 16:20:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:48,091 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 [2021-11-22 16:20:48,098 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 [2021-11-22 16:20:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:20:48,462 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-22 16:20:48,462 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 [2021-11-22 16:20:49,412 INFO L354 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2021-11-22 16:20:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 37 [2021-11-22 16:20:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:49,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-22 16:20:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:51,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837752139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:51,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:51,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 45 [2021-11-22 16:20:51,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81713146] [2021-11-22 16:20:51,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-22 16:20:51,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:51,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-22 16:20:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1845, Unknown=1, NotChecked=0, Total=1980 [2021-11-22 16:20:51,746 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:53,467 INFO L93 Difference]: Finished difference Result 293 states and 316 transitions. [2021-11-22 16:20:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 16:20:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-22 16:20:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:53,474 INFO L225 Difference]: With dead ends: 293 [2021-11-22 16:20:53,474 INFO L226 Difference]: Without dead ends: 233 [2021-11-22 16:20:53,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=4404, Unknown=1, NotChecked=0, Total=4830 [2021-11-22 16:20:53,477 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:53,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 677 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 485 Invalid, 0 Unknown, 236 Unchecked, 0.3s Time] [2021-11-22 16:20:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-22 16:20:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 227. [2021-11-22 16:20:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0977777777777777) internal successors, (247), 226 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 247 transitions. [2021-11-22 16:20:53,485 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 247 transitions. Word has length 63 [2021-11-22 16:20:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:53,486 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 247 transitions. [2021-11-22 16:20:53,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 247 transitions. [2021-11-22 16:20:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:20:53,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:53,487 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:53,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:53,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 16:20:53,707 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1936363915, now seen corresponding path program 1 times [2021-11-22 16:20:53,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:53,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891343787] [2021-11-22 16:20:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:53,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:20:53,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891343787] [2021-11-22 16:20:53,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891343787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590963880] [2021-11-22 16:20:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:53,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:53,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:53,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:53,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:20:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 16:20:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:54,010 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:20:54,011 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 [2021-11-22 16:20:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:20:54,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:20:54,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590963880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:54,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:54,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-11-22 16:20:54,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887653978] [2021-11-22 16:20:54,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-22 16:20:54,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-22 16:20:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:20:54,847 INFO L87 Difference]: Start difference. First operand 227 states and 247 transitions. Second operand has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:55,201 INFO L93 Difference]: Finished difference Result 359 states and 390 transitions. [2021-11-22 16:20:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:20:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-22 16:20:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:55,205 INFO L225 Difference]: With dead ends: 359 [2021-11-22 16:20:55,205 INFO L226 Difference]: Without dead ends: 359 [2021-11-22 16:20:55,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 16:20:55,207 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 314 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:55,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 317 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:20:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-22 16:20:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2021-11-22 16:20:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.0987654320987654) internal successors, (267), 244 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 267 transitions. [2021-11-22 16:20:55,217 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 267 transitions. Word has length 63 [2021-11-22 16:20:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:55,218 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 267 transitions. [2021-11-22 16:20:55,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.444444444444445) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 267 transitions. [2021-11-22 16:20:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:20:55,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:55,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:55,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:55,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 16:20:55,444 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:55,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 5 times [2021-11-22 16:20:55,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:55,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115316440] [2021-11-22 16:20:55,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:55,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:55,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115316440] [2021-11-22 16:20:55,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115316440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409102111] [2021-11-22 16:20:55,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:20:55,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:55,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:55,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:20:55,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 16:20:55,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:55,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 16:20:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:55,705 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:20:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-22 16:20:55,707 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 [2021-11-22 16:20:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:56,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:20:56,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409102111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:56,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:20:56,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-11-22 16:20:56,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665956512] [2021-11-22 16:20:56,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:56,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 16:20:56,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:20:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 16:20:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:20:56,742 INFO L87 Difference]: Start difference. First operand 245 states and 267 transitions. Second operand has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:57,301 INFO L93 Difference]: Finished difference Result 362 states and 392 transitions. [2021-11-22 16:20:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:20:57,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 16:20:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:57,304 INFO L225 Difference]: With dead ends: 362 [2021-11-22 16:20:57,304 INFO L226 Difference]: Without dead ends: 362 [2021-11-22 16:20:57,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 16:20:57,306 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 462 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:57,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 571 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:20:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-22 16:20:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 303. [2021-11-22 16:20:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.0996677740863787) internal successors, (331), 302 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 331 transitions. [2021-11-22 16:20:57,315 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 331 transitions. Word has length 67 [2021-11-22 16:20:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:57,316 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 331 transitions. [2021-11-22 16:20:57,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 6.892857142857143) internal successors, (193), 29 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 331 transitions. [2021-11-22 16:20:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 16:20:57,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:57,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:20:57,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:20:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:57,532 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:20:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1190420041, now seen corresponding path program 2 times [2021-11-22 16:20:57,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:20:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139765365] [2021-11-22 16:20:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:20:57,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:20:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:20:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:20:58,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:20:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139765365] [2021-11-22 16:20:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139765365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:20:58,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990106216] [2021-11-22 16:20:58,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:20:58,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:20:58,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:20:58,172 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:20:58,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:20:58,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:20:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 16:20:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:58,463 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 [2021-11-22 16:20:59,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:20:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:20:59,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:59,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 16:20:59,787 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 [2021-11-22 16:21:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:00,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990106216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:00,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:00,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 40 [2021-11-22 16:21:00,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70104977] [2021-11-22 16:21:00,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:00,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-22 16:21:00,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-22 16:21:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 16:21:00,084 INFO L87 Difference]: Start difference. First operand 303 states and 331 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:02,233 INFO L93 Difference]: Finished difference Result 544 states and 579 transitions. [2021-11-22 16:21:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 16:21:02,234 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-22 16:21:02,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:02,237 INFO L225 Difference]: With dead ends: 544 [2021-11-22 16:21:02,237 INFO L226 Difference]: Without dead ends: 479 [2021-11-22 16:21:02,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=627, Invalid=4065, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 16:21:02,240 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 454 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:02,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 1049 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 800 Invalid, 0 Unknown, 432 Unchecked, 0.5s Time] [2021-11-22 16:21:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-22 16:21:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 391. [2021-11-22 16:21:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 389 states have (on average 1.0925449871465296) internal successors, (425), 390 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 425 transitions. [2021-11-22 16:21:02,253 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 425 transitions. Word has length 69 [2021-11-22 16:21:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:02,253 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 425 transitions. [2021-11-22 16:21:02,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 425 transitions. [2021-11-22 16:21:02,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:21:02,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:02,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:02,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:02,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-22 16:21:02,468 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:02,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1844856972, now seen corresponding path program 3 times [2021-11-22 16:21:02,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:02,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198239759] [2021-11-22 16:21:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:02,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:02,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198239759] [2021-11-22 16:21:02,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198239759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288971953] [2021-11-22 16:21:02,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:21:02,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:02,697 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:02,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 16:21:02,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 16:21:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:02,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 16:21:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:03,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:03,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-22 16:21:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288971953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:03,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-11-22 16:21:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326107232] [2021-11-22 16:21:03,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 16:21:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 16:21:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-11-22 16:21:03,529 INFO L87 Difference]: Start difference. First operand 391 states and 425 transitions. Second operand has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:04,059 INFO L93 Difference]: Finished difference Result 617 states and 670 transitions. [2021-11-22 16:21:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:21:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-22 16:21:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:04,063 INFO L225 Difference]: With dead ends: 617 [2021-11-22 16:21:04,063 INFO L226 Difference]: Without dead ends: 617 [2021-11-22 16:21:04,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 16:21:04,067 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 306 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:04,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 478 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:21:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-22 16:21:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 415. [2021-11-22 16:21:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 413 states have (on average 1.0944309927360776) internal successors, (452), 414 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 452 transitions. [2021-11-22 16:21:04,082 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 452 transitions. Word has length 73 [2021-11-22 16:21:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:04,083 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 452 transitions. [2021-11-22 16:21:04,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.333333333333333) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 452 transitions. [2021-11-22 16:21:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 16:21:04,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:04,085 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:04,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 16:21:04,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:04,300 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 4 times [2021-11-22 16:21:04,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:04,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550324208] [2021-11-22 16:21:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:04,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:21:04,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:04,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550324208] [2021-11-22 16:21:04,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550324208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:04,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218682715] [2021-11-22 16:21:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:21:04,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:04,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:04,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 16:21:05,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:21:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-22 16:21:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:05,031 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:21:05,032 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 [2021-11-22 16:21:05,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:21:05,748 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-22 16:21:05,749 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 [2021-11-22 16:21:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:05,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:06,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-22 16:21:06,397 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 [2021-11-22 16:21:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:21:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218682715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:06,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:06,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 48 [2021-11-22 16:21:06,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611258156] [2021-11-22 16:21:06,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:06,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-22 16:21:06,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-22 16:21:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 16:21:06,950 INFO L87 Difference]: Start difference. First operand 415 states and 452 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:21:10,355 INFO L93 Difference]: Finished difference Result 796 states and 849 transitions. [2021-11-22 16:21:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-22 16:21:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 16:21:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:21:10,359 INFO L225 Difference]: With dead ends: 796 [2021-11-22 16:21:10,359 INFO L226 Difference]: Without dead ends: 714 [2021-11-22 16:21:10,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1361, Invalid=7569, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:21:10,363 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1085 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:21:10,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 1009 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1560 Invalid, 0 Unknown, 281 Unchecked, 0.8s Time] [2021-11-22 16:21:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-22 16:21:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 527. [2021-11-22 16:21:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 525 states have (on average 1.0933333333333333) internal successors, (574), 526 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 574 transitions. [2021-11-22 16:21:10,378 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 574 transitions. Word has length 79 [2021-11-22 16:21:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:21:10,378 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 574 transitions. [2021-11-22 16:21:10,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:21:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 574 transitions. [2021-11-22 16:21:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 16:21:10,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:21:10,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:21:10,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 16:21:10,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:10,596 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:21:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:21:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2132340658, now seen corresponding path program 6 times [2021-11-22 16:21:10,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:21:10,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674784038] [2021-11-22 16:21:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:21:10,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:21:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:21:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:21:11,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:21:11,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674784038] [2021-11-22 16:21:11,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674784038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:21:11,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619571977] [2021-11-22 16:21:11,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:21:11,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:21:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:21:11,089 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:21:11,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 16:21:11,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-22 16:21:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:21:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-22 16:21:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:21:11,198 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 [2021-11-22 16:21:11,431 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 [2021-11-22 16:21:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2021-11-22 16:21:22,619 INFO L354 Elim1Store]: treesize reduction 92, result has 26.4 percent of original size [2021-11-22 16:21:22,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 76 [2021-11-22 16:21:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 89 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:21:22,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:21:27,535 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (or (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0) (forall ((|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57| Int)) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse2) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|))) (not (= .cse0 (select .cse1 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57|))) (< |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56| 0) (< (+ |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57| 1) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|) (< (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2) |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_57|) (<= (+ 2 |v_ULTIMATE.start_cstrspn_~sc1~0#1.offset_56|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))))))) is different from false [2021-11-22 16:21:27,582 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-22 16:21:27,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 300 [2021-11-22 16:21:27,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:21:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 292 treesize of output 276 [2021-11-22 16:21:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 272 [2021-11-22 16:21:27,792 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-11-22 16:21:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 136 [2021-11-22 16:21:27,886 INFO L354 Elim1Store]: treesize reduction 7, result has 87.9 percent of original size [2021-11-22 16:21:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 145 [2021-11-22 16:21:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:21:28,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619571977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:21:28,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:21:28,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 71 [2021-11-22 16:21:28,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622390283] [2021-11-22 16:21:28,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:21:28,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-22 16:21:28,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:21:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-22 16:21:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4531, Unknown=4, NotChecked=136, Total=4970 [2021-11-22 16:21:28,223 INFO L87 Difference]: Start difference. First operand 527 states and 574 transitions. Second operand has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:36,569 INFO L93 Difference]: Finished difference Result 980 states and 1052 transitions. [2021-11-22 16:23:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-22 16:23:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 16:23:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:36,574 INFO L225 Difference]: With dead ends: 980 [2021-11-22 16:23:36,574 INFO L226 Difference]: Without dead ends: 862 [2021-11-22 16:23:36,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 120 SyntacticMatches, 21 SemanticMatches, 159 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7048 ImplicationChecksByTransitivity, 140.7s TimeCoverageRelationStatistics Valid=2067, Invalid=23354, Unknown=23, NotChecked=316, Total=25760 [2021-11-22 16:23:36,581 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1011 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 457 Invalid, 0 Unknown, 592 Unchecked, 0.3s Time] [2021-11-22 16:23:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-22 16:23:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 786. [2021-11-22 16:23:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 784 states have (on average 1.0880102040816326) internal successors, (853), 785 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 853 transitions. [2021-11-22 16:23:36,625 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 853 transitions. Word has length 80 [2021-11-22 16:23:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:36,625 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 853 transitions. [2021-11-22 16:23:36,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.183098591549296) internal successors, (226), 71 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 853 transitions. [2021-11-22 16:23:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 16:23:36,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:36,628 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:36,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:36,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-22 16:23:36,845 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1938211421, now seen corresponding path program 5 times [2021-11-22 16:23:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614426176] [2021-11-22 16:23:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:36,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 6 proven. 114 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:23:37,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614426176] [2021-11-22 16:23:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614426176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:37,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915021510] [2021-11-22 16:23:37,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:23:37,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:37,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:37,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 16:23:37,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-22 16:23:37,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-22 16:23:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:37,289 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:23:37,290 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 [2021-11-22 16:23:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:23:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:23:38,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915021510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:38,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2021-11-22 16:23:38,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614197711] [2021-11-22 16:23:38,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:38,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 16:23:38,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 16:23:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 16:23:38,647 INFO L87 Difference]: Start difference. First operand 786 states and 853 transitions. Second operand has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:23:39,654 INFO L93 Difference]: Finished difference Result 1111 states and 1206 transitions. [2021-11-22 16:23:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:23:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 16:23:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:23:39,660 INFO L225 Difference]: With dead ends: 1111 [2021-11-22 16:23:39,660 INFO L226 Difference]: Without dead ends: 1111 [2021-11-22 16:23:39,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=419, Invalid=1561, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 16:23:39,661 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 271 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:23:39,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 666 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 16:23:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-22 16:23:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 810. [2021-11-22 16:23:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 808 states have (on average 1.0891089108910892) internal successors, (880), 809 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 880 transitions. [2021-11-22 16:23:39,713 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 880 transitions. Word has length 83 [2021-11-22 16:23:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:23:39,713 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 880 transitions. [2021-11-22 16:23:39,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.71875) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:23:39,714 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 880 transitions. [2021-11-22 16:23:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 16:23:39,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:23:39,716 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:23:39,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 16:23:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-22 16:23:39,933 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:23:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:23:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 6 times [2021-11-22 16:23:39,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:23:39,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254642378] [2021-11-22 16:23:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:23:39,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:23:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:23:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:23:40,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:23:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254642378] [2021-11-22 16:23:40,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254642378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:23:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360934848] [2021-11-22 16:23:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:23:40,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:23:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:23:40,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:23:40,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 16:23:40,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 16:23:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:23:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-22 16:23:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:23:40,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-22 16:23:49,263 INFO L354 Elim1Store]: treesize reduction 3, result has 72.7 percent of original size [2021-11-22 16:23:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2021-11-22 16:23:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 140 refuted. 2 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:23:49,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:23:50,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-22 16:23:50,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2021-11-22 16:23:50,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-11-22 16:23:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:23:50,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360934848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:23:50,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:23:50,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2021-11-22 16:23:50,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557096171] [2021-11-22 16:23:50,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:23:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-22 16:23:50,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:23:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-22 16:23:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2055, Unknown=2, NotChecked=0, Total=2256 [2021-11-22 16:23:50,914 INFO L87 Difference]: Start difference. First operand 810 states and 880 transitions. Second operand has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:07,059 INFO L93 Difference]: Finished difference Result 1537 states and 1674 transitions. [2021-11-22 16:25:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-22 16:25:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 16:25:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:07,065 INFO L225 Difference]: With dead ends: 1537 [2021-11-22 16:25:07,065 INFO L226 Difference]: Without dead ends: 1443 [2021-11-22 16:25:07,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3441 ImplicationChecksByTransitivity, 83.4s TimeCoverageRelationStatistics Valid=1429, Invalid=10552, Unknown=9, NotChecked=0, Total=11990 [2021-11-22 16:25:07,067 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 250 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:07,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 991 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 791 Invalid, 0 Unknown, 321 Unchecked, 0.5s Time] [2021-11-22 16:25:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-11-22 16:25:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1107. [2021-11-22 16:25:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1105 states have (on average 1.0914027149321266) internal successors, (1206), 1106 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1206 transitions. [2021-11-22 16:25:07,098 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1206 transitions. Word has length 89 [2021-11-22 16:25:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:07,098 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1206 transitions. [2021-11-22 16:25:07,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.25) internal successors, (204), 48 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1206 transitions. [2021-11-22 16:25:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-22 16:25:07,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:07,102 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:07,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:07,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-22 16:25:07,316 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 318466939, now seen corresponding path program 2 times [2021-11-22 16:25:07,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099830176] [2021-11-22 16:25:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:07,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:25:08,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099830176] [2021-11-22 16:25:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099830176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470766799] [2021-11-22 16:25:08,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:25:08,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:08,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:08,325 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 16:25:08,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:25:08,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 16:25:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:08,450 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 [2021-11-22 16:25:08,848 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 [2021-11-22 16:25:08,922 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:25:08,922 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 [2021-11-22 16:25:10,906 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:25:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-11-22 16:25:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:13,433 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 [2021-11-22 16:25:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:14,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470766799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:14,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 43 [2021-11-22 16:25:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547564742] [2021-11-22 16:25:14,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:14,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-22 16:25:14,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-22 16:25:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1671, Unknown=1, NotChecked=0, Total=1806 [2021-11-22 16:25:14,058 INFO L87 Difference]: Start difference. First operand 1107 states and 1206 transitions. Second operand has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:15,530 INFO L93 Difference]: Finished difference Result 1302 states and 1416 transitions. [2021-11-22 16:25:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 16:25:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-22 16:25:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:15,534 INFO L225 Difference]: With dead ends: 1302 [2021-11-22 16:25:15,535 INFO L226 Difference]: Without dead ends: 974 [2021-11-22 16:25:15,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=349, Invalid=3190, Unknown=1, NotChecked=0, Total=3540 [2021-11-22 16:25:15,536 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 171 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:15,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1005 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 564 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2021-11-22 16:25:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-22 16:25:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 890. [2021-11-22 16:25:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 888 states have (on average 1.1013513513513513) internal successors, (978), 889 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 978 transitions. [2021-11-22 16:25:15,573 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 978 transitions. Word has length 90 [2021-11-22 16:25:15,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:15,573 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 978 transitions. [2021-11-22 16:25:15,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.27906976744186) internal successors, (184), 43 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 978 transitions. [2021-11-22 16:25:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 16:25:15,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:15,577 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:15,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:15,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-22 16:25:15,801 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 296080472, now seen corresponding path program 3 times [2021-11-22 16:25:15,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995294758] [2021-11-22 16:25:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:15,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:16,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995294758] [2021-11-22 16:25:16,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995294758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:16,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942474126] [2021-11-22 16:25:16,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:25:16,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:16,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:16,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:16,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 16:25:16,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 16:25:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 16:25:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:16,246 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:25:16,246 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 [2021-11-22 16:25:16,249 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 [2021-11-22 16:25:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:16,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:17,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942474126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:17,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:17,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-11-22 16:25:17,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105119519] [2021-11-22 16:25:17,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:17,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 16:25:17,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 16:25:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 16:25:17,803 INFO L87 Difference]: Start difference. First operand 890 states and 978 transitions. Second operand has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:18,729 INFO L93 Difference]: Finished difference Result 1336 states and 1458 transitions. [2021-11-22 16:25:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 16:25:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-22 16:25:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:18,735 INFO L225 Difference]: With dead ends: 1336 [2021-11-22 16:25:18,735 INFO L226 Difference]: Without dead ends: 1336 [2021-11-22 16:25:18,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=458, Invalid=1894, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 16:25:18,737 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 603 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:18,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 724 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:25:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-11-22 16:25:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1073. [2021-11-22 16:25:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1071 states have (on average 1.1017740429505136) internal successors, (1180), 1072 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1180 transitions. [2021-11-22 16:25:18,766 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1180 transitions. Word has length 94 [2021-11-22 16:25:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:18,766 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1180 transitions. [2021-11-22 16:25:18,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 7.264705882352941) internal successors, (247), 35 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1180 transitions. [2021-11-22 16:25:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-22 16:25:18,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:18,770 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:18,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:18,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 16:25:18,996 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1562726686, now seen corresponding path program 7 times [2021-11-22 16:25:18,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:18,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057365710] [2021-11-22 16:25:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:18,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 114 proven. 152 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:19,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057365710] [2021-11-22 16:25:19,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057365710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204592601] [2021-11-22 16:25:19,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:25:19,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:19,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:19,351 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:19,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 16:25:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-22 16:25:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:19,451 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:25:19,451 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 [2021-11-22 16:25:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 145 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:20,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 139 proven. 127 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:20,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204592601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:20,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:20,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2021-11-22 16:25:20,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175879504] [2021-11-22 16:25:20,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:20,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 16:25:20,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:20,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 16:25:20,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 16:25:20,660 INFO L87 Difference]: Start difference. First operand 1073 states and 1180 transitions. Second operand has 44 states, 44 states have (on average 4.863636363636363) internal successors, (214), 44 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) [2021-11-22 16:25:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:21,754 INFO L93 Difference]: Finished difference Result 1979 states and 2144 transitions. [2021-11-22 16:25:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 16:25:21,755 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.863636363636363) internal successors, (214), 44 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) Word has length 105 [2021-11-22 16:25:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:21,765 INFO L225 Difference]: With dead ends: 1979 [2021-11-22 16:25:21,765 INFO L226 Difference]: Without dead ends: 1744 [2021-11-22 16:25:21,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1090, Invalid=3602, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 16:25:21,767 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 750 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:21,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 593 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:25:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-11-22 16:25:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1356. [2021-11-22 16:25:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1354 states have (on average 1.103397341211226) internal successors, (1494), 1355 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1494 transitions. [2021-11-22 16:25:21,804 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1494 transitions. Word has length 105 [2021-11-22 16:25:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:21,804 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 1494 transitions. [2021-11-22 16:25:21,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.863636363636363) internal successors, (214), 44 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) [2021-11-22 16:25:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1494 transitions. [2021-11-22 16:25:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-22 16:25:21,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:21,808 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:21,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:22,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-22 16:25:22,024 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash -209651763, now seen corresponding path program 4 times [2021-11-22 16:25:22,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:22,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999340906] [2021-11-22 16:25:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:22,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:22,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999340906] [2021-11-22 16:25:22,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999340906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61976938] [2021-11-22 16:25:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:25:22,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:22,370 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:22,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 16:25:22,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:25:22,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 16:25:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:22,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-22 16:25:22,513 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 [2021-11-22 16:25:23,052 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 [2021-11-22 16:25:23,104 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-22 16:25:23,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-22 16:25:24,511 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-22 16:25:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2021-11-22 16:25:24,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-22 16:25:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 155 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:24,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-11-22 16:25:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:28,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61976938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:28,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:28,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2021-11-22 16:25:28,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106887426] [2021-11-22 16:25:28,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:28,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 16:25:28,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 16:25:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1710, Unknown=1, NotChecked=0, Total=1892 [2021-11-22 16:25:28,400 INFO L87 Difference]: Start difference. First operand 1356 states and 1494 transitions. Second operand has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:29,738 INFO L93 Difference]: Finished difference Result 2359 states and 2583 transitions. [2021-11-22 16:25:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:25:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-22 16:25:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:29,745 INFO L225 Difference]: With dead ends: 2359 [2021-11-22 16:25:29,746 INFO L226 Difference]: Without dead ends: 1662 [2021-11-22 16:25:29,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=457, Invalid=3702, Unknown=1, NotChecked=0, Total=4160 [2021-11-22 16:25:29,746 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:29,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 993 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 555 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2021-11-22 16:25:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-11-22 16:25:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1458. [2021-11-22 16:25:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1456 states have (on average 1.1043956043956045) internal successors, (1608), 1457 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 1608 transitions. [2021-11-22 16:25:29,781 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 1608 transitions. Word has length 107 [2021-11-22 16:25:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:29,782 INFO L470 AbstractCegarLoop]: Abstraction has 1458 states and 1608 transitions. [2021-11-22 16:25:29,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.863636363636363) internal successors, (258), 44 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 1608 transitions. [2021-11-22 16:25:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-22 16:25:29,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:29,786 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:29,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:30,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-22 16:25:30,000 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1449397339, now seen corresponding path program 8 times [2021-11-22 16:25:30,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:30,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419255004] [2021-11-22 16:25:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:30,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:30,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419255004] [2021-11-22 16:25:30,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419255004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847441126] [2021-11-22 16:25:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:25:30,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:30,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:30,462 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 16:25:30,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:25:30,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:30,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 16:25:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:30,970 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 [2021-11-22 16:25:32,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:25:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:32,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 16:25:32,692 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 [2021-11-22 16:25:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 254 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:33,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847441126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:33,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:33,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 55 [2021-11-22 16:25:33,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422321889] [2021-11-22 16:25:33,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:33,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 16:25:33,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 16:25:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2768, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 16:25:33,425 INFO L87 Difference]: Start difference. First operand 1458 states and 1608 transitions. Second operand has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:35,466 INFO L93 Difference]: Finished difference Result 2383 states and 2601 transitions. [2021-11-22 16:25:35,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:25:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-22 16:25:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:35,475 INFO L225 Difference]: With dead ends: 2383 [2021-11-22 16:25:35,475 INFO L226 Difference]: Without dead ends: 2002 [2021-11-22 16:25:35,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=506, Invalid=4750, Unknown=0, NotChecked=0, Total=5256 [2021-11-22 16:25:35,477 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 553 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:35,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 3083 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2385 Invalid, 0 Unknown, 229 Unchecked, 1.2s Time] [2021-11-22 16:25:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-11-22 16:25:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1474. [2021-11-22 16:25:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1472 states have (on average 1.1039402173913044) internal successors, (1625), 1473 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 1625 transitions. [2021-11-22 16:25:35,523 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 1625 transitions. Word has length 109 [2021-11-22 16:25:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:35,523 INFO L470 AbstractCegarLoop]: Abstraction has 1474 states and 1625 transitions. [2021-11-22 16:25:35,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 1625 transitions. [2021-11-22 16:25:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-22 16:25:35,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:35,528 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:35,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:35,749 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -740047728, now seen corresponding path program 5 times [2021-11-22 16:25:35,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114935876] [2021-11-22 16:25:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:35,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:25:36,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114935876] [2021-11-22 16:25:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114935876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236883837] [2021-11-22 16:25:36,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:25:36,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:36,050 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:36,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 16:25:36,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-22 16:25:36,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-22 16:25:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:36,243 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:25:36,244 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 [2021-11-22 16:25:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 182 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:25:38,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:25:39,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236883837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:39,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:39,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 49 [2021-11-22 16:25:39,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806899925] [2021-11-22 16:25:39,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:39,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 16:25:39,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 16:25:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 16:25:39,523 INFO L87 Difference]: Start difference. First operand 1474 states and 1625 transitions. Second operand has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:41,844 INFO L93 Difference]: Finished difference Result 2172 states and 2378 transitions. [2021-11-22 16:25:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 16:25:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-22 16:25:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:41,859 INFO L225 Difference]: With dead ends: 2172 [2021-11-22 16:25:41,860 INFO L226 Difference]: Without dead ends: 2172 [2021-11-22 16:25:41,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1324, Invalid=4996, Unknown=0, NotChecked=0, Total=6320 [2021-11-22 16:25:41,861 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1063 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:41,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 1097 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1402 Invalid, 0 Unknown, 78 Unchecked, 0.9s Time] [2021-11-22 16:25:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-11-22 16:25:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1713. [2021-11-22 16:25:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1711 states have (on average 1.1040327293980128) internal successors, (1889), 1712 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 1889 transitions. [2021-11-22 16:25:41,905 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 1889 transitions. Word has length 111 [2021-11-22 16:25:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:41,906 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 1889 transitions. [2021-11-22 16:25:41,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 6.244897959183674) internal successors, (306), 50 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 1889 transitions. [2021-11-22 16:25:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-22 16:25:41,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:41,910 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:41,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-22 16:25:42,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:42,124 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash 819404520, now seen corresponding path program 9 times [2021-11-22 16:25:42,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:42,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103490105] [2021-11-22 16:25:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:42,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 45 proven. 267 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:42,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103490105] [2021-11-22 16:25:42,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103490105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154029556] [2021-11-22 16:25:42,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:25:42,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:42,597 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:42,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 16:25:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 16:25:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 16:25:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:43,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:44,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-22 16:25:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:44,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154029556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:44,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:44,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2021-11-22 16:25:44,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816173190] [2021-11-22 16:25:44,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-22 16:25:44,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:44,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-22 16:25:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2207, Unknown=0, NotChecked=0, Total=2550 [2021-11-22 16:25:44,251 INFO L87 Difference]: Start difference. First operand 1713 states and 1889 transitions. Second operand has 51 states, 50 states have (on average 5.28) internal successors, (264), 51 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:45,738 INFO L93 Difference]: Finished difference Result 2865 states and 3149 transitions. [2021-11-22 16:25:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 16:25:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.28) internal successors, (264), 51 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-22 16:25:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:45,750 INFO L225 Difference]: With dead ends: 2865 [2021-11-22 16:25:45,750 INFO L226 Difference]: Without dead ends: 2865 [2021-11-22 16:25:45,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=845, Invalid=3577, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 16:25:45,751 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 791 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:45,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1243 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 16:25:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-11-22 16:25:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 1761. [2021-11-22 16:25:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.1051733939738488) internal successors, (1944), 1760 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 1944 transitions. [2021-11-22 16:25:45,799 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 1944 transitions. Word has length 113 [2021-11-22 16:25:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:45,799 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 1944 transitions. [2021-11-22 16:25:45,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.28) internal successors, (264), 51 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 1944 transitions. [2021-11-22 16:25:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-22 16:25:45,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:45,803 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:45,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:46,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-22 16:25:46,017 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash 43953276, now seen corresponding path program 10 times [2021-11-22 16:25:46,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:46,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145960611] [2021-11-22 16:25:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:46,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 37 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:46,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145960611] [2021-11-22 16:25:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145960611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845979685] [2021-11-22 16:25:46,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:25:46,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:46,526 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:46,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 16:25:46,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:25:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:46,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-22 16:25:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:46,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:25:46,648 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 [2021-11-22 16:25:47,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:25:48,134 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-22 16:25:48,134 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 [2021-11-22 16:25:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 170 proven. 197 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:48,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:49,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-22 16:25:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-22 16:25:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 157 proven. 210 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:50,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845979685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:50,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:25:50,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 67 [2021-11-22 16:25:50,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259576104] [2021-11-22 16:25:50,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:50,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-22 16:25:50,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:25:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-22 16:25:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=4034, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 16:25:50,738 INFO L87 Difference]: Start difference. First operand 1761 states and 1944 transitions. Second operand has 67 states, 67 states have (on average 4.582089552238806) internal successors, (307), 67 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:59,060 INFO L93 Difference]: Finished difference Result 3510 states and 3823 transitions. [2021-11-22 16:25:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-22 16:25:59,061 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.582089552238806) internal successors, (307), 67 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-22 16:25:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:59,073 INFO L225 Difference]: With dead ends: 3510 [2021-11-22 16:25:59,073 INFO L226 Difference]: Without dead ends: 3070 [2021-11-22 16:25:59,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 198 SyntacticMatches, 9 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2728, Invalid=17578, Unknown=0, NotChecked=0, Total=20306 [2021-11-22 16:25:59,074 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 2251 mSDsluCounter, 4590 mSDsCounter, 0 mSdLazyCounter, 6092 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 4761 SdHoareTripleChecker+Invalid, 6763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 6092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:59,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 4761 Invalid, 6763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 6092 Invalid, 0 Unknown, 474 Unchecked, 3.4s Time] [2021-11-22 16:25:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-11-22 16:25:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2140. [2021-11-22 16:25:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2138 states have (on average 1.106641721234799) internal successors, (2366), 2139 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2366 transitions. [2021-11-22 16:25:59,122 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2366 transitions. Word has length 119 [2021-11-22 16:25:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:59,123 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2366 transitions. [2021-11-22 16:25:59,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.582089552238806) internal successors, (307), 67 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2366 transitions. [2021-11-22 16:25:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-22 16:25:59,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:59,128 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:59,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:59,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-22 16:25:59,331 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:25:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1576722431, now seen corresponding path program 11 times [2021-11-22 16:25:59,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:25:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337008224] [2021-11-22 16:25:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:25:59,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:25:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:25:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 66 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:25:59,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:25:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337008224] [2021-11-22 16:25:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337008224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:25:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692451062] [2021-11-22 16:25:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:25:59,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:25:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:25:59,900 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:25:59,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-22 16:26:00,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-22 16:26:00,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 16:26:00,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:00,122 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:26:00,122 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 [2021-11-22 16:26:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 305 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:01,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 120 proven. 276 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:02,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692451062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:02,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:02,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 51 [2021-11-22 16:26:02,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392319560] [2021-11-22 16:26:02,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:02,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-22 16:26:02,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-22 16:26:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-11-22 16:26:02,475 INFO L87 Difference]: Start difference. First operand 2140 states and 2366 transitions. Second operand has 52 states, 51 states have (on average 5.450980392156863) internal successors, (278), 52 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:04,643 INFO L93 Difference]: Finished difference Result 3392 states and 3734 transitions. [2021-11-22 16:26:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 16:26:04,644 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.450980392156863) internal successors, (278), 52 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-22 16:26:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:04,657 INFO L225 Difference]: With dead ends: 3392 [2021-11-22 16:26:04,657 INFO L226 Difference]: Without dead ends: 3392 [2021-11-22 16:26:04,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1092, Invalid=4458, Unknown=0, NotChecked=0, Total=5550 [2021-11-22 16:26:04,658 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 864 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:04,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 1542 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-22 16:26:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-11-22 16:26:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 2188. [2021-11-22 16:26:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2186 states have (on average 1.107502287282708) internal successors, (2421), 2187 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2421 transitions. [2021-11-22 16:26:04,705 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2421 transitions. Word has length 123 [2021-11-22 16:26:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:04,705 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 2421 transitions. [2021-11-22 16:26:04,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.450980392156863) internal successors, (278), 52 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2421 transitions. [2021-11-22 16:26:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-22 16:26:04,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:04,710 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:04,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:04,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:04,924 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -772988267, now seen corresponding path program 6 times [2021-11-22 16:26:04,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:04,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148883495] [2021-11-22 16:26:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:04,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:05,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148883495] [2021-11-22 16:26:05,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148883495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653196423] [2021-11-22 16:26:05,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:26:05,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:05,405 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:05,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-22 16:26:05,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-22 16:26:05,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:05,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-22 16:26:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:05,623 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 10 treesize of output 8 [2021-11-22 16:26:06,107 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 [2021-11-22 16:26:06,170 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:26:06,171 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 [2021-11-22 16:26:09,324 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-11-22 16:26:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-11-22 16:26:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 265 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:26:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:23,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:26:23,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:26:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 270 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:26:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653196423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:24,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:24,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 23] total 56 [2021-11-22 16:26:24,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127199696] [2021-11-22 16:26:24,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-22 16:26:24,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-22 16:26:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2906, Unknown=0, NotChecked=0, Total=3080 [2021-11-22 16:26:24,479 INFO L87 Difference]: Start difference. First operand 2188 states and 2421 transitions. Second operand has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:25,435 INFO L93 Difference]: Finished difference Result 3731 states and 4111 transitions. [2021-11-22 16:26:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 16:26:25,436 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-22 16:26:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:25,449 INFO L225 Difference]: With dead ends: 3731 [2021-11-22 16:26:25,450 INFO L226 Difference]: Without dead ends: 2557 [2021-11-22 16:26:25,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=256, Invalid=4034, Unknown=0, NotChecked=0, Total=4290 [2021-11-22 16:26:25,451 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 99 mSDsluCounter, 2094 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:25,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 2170 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 786 Invalid, 0 Unknown, 280 Unchecked, 0.4s Time] [2021-11-22 16:26:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-11-22 16:26:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2310. [2021-11-22 16:26:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 2308 states have (on average 1.1078856152513) internal successors, (2557), 2309 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 2557 transitions. [2021-11-22 16:26:25,485 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 2557 transitions. Word has length 124 [2021-11-22 16:26:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:25,486 INFO L470 AbstractCegarLoop]: Abstraction has 2310 states and 2557 transitions. [2021-11-22 16:26:25,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.196428571428571) internal successors, (291), 56 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 2557 transitions. [2021-11-22 16:26:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-22 16:26:25,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:25,491 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:25,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:25,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:25,716 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2098926642, now seen corresponding path program 7 times [2021-11-22 16:26:25,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:25,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094636791] [2021-11-22 16:26:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:25,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 28 proven. 269 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:26,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094636791] [2021-11-22 16:26:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094636791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682622137] [2021-11-22 16:26:26,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:26:26,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:26,043 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:26,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-22 16:26:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-22 16:26:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:26,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:27,611 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 [2021-11-22 16:26:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 252 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:27,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682622137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:27,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:27,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-22 16:26:27,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876095230] [2021-11-22 16:26:27,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-22 16:26:27,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-22 16:26:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 16:26:27,710 INFO L87 Difference]: Start difference. First operand 2310 states and 2557 transitions. Second operand has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:28,815 INFO L93 Difference]: Finished difference Result 3435 states and 3782 transitions. [2021-11-22 16:26:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:26:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-22 16:26:28,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:28,830 INFO L225 Difference]: With dead ends: 3435 [2021-11-22 16:26:28,831 INFO L226 Difference]: Without dead ends: 3435 [2021-11-22 16:26:28,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 16:26:28,832 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 623 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:28,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 1398 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:26:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-22 16:26:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2623. [2021-11-22 16:26:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2621 states have (on average 1.1079740557039297) internal successors, (2904), 2622 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 2904 transitions. [2021-11-22 16:26:28,879 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 2904 transitions. Word has length 128 [2021-11-22 16:26:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:28,879 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 2904 transitions. [2021-11-22 16:26:28,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 7.142857142857143) internal successors, (250), 36 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 2904 transitions. [2021-11-22 16:26:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-22 16:26:28,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:28,884 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:28,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:29,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-22 16:26:29,108 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash -589496237, now seen corresponding path program 12 times [2021-11-22 16:26:29,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:29,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831289563] [2021-11-22 16:26:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:29,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:29,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:29,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831289563] [2021-11-22 16:26:29,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831289563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:29,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157063343] [2021-11-22 16:26:29,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:26:29,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:29,683 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:29,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-22 16:26:29,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-22 16:26:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-22 16:26:29,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:30,351 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 [2021-11-22 16:26:30,989 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 [2021-11-22 16:26:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:31,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:26:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:26:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 41 proven. 416 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:31,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157063343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:31,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:31,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2021-11-22 16:26:31,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593653204] [2021-11-22 16:26:31,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:31,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 16:26:31,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 16:26:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 16:26:31,653 INFO L87 Difference]: Start difference. First operand 2623 states and 2904 transitions. Second operand has 46 states, 46 states have (on average 4.673913043478261) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:34,360 INFO L93 Difference]: Finished difference Result 4660 states and 5120 transitions. [2021-11-22 16:26:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 16:26:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.673913043478261) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-22 16:26:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:34,367 INFO L225 Difference]: With dead ends: 4660 [2021-11-22 16:26:34,367 INFO L226 Difference]: Without dead ends: 4007 [2021-11-22 16:26:34,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=444, Invalid=4386, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 16:26:34,368 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 863 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 3357 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 4264 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:34,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 4264 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3357 Invalid, 0 Unknown, 141 Unchecked, 1.7s Time] [2021-11-22 16:26:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-11-22 16:26:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3110. [2021-11-22 16:26:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3110 states, 3108 states have (on average 1.1093951093951093) internal successors, (3448), 3109 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3110 states to 3110 states and 3448 transitions. [2021-11-22 16:26:34,430 INFO L78 Accepts]: Start accepts. Automaton has 3110 states and 3448 transitions. Word has length 129 [2021-11-22 16:26:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:34,431 INFO L470 AbstractCegarLoop]: Abstraction has 3110 states and 3448 transitions. [2021-11-22 16:26:34,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.673913043478261) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3110 states and 3448 transitions. [2021-11-22 16:26:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 16:26:34,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:34,437 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:34,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:34,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-22 16:26:34,660 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1977412630, now seen corresponding path program 13 times [2021-11-22 16:26:34,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243206126] [2021-11-22 16:26:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:34,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 91 proven. 399 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:35,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:35,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243206126] [2021-11-22 16:26:35,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243206126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:35,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587916230] [2021-11-22 16:26:35,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:26:35,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:35,230 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:35,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-22 16:26:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 16:26:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:35,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:26:35,372 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 [2021-11-22 16:26:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:38,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587916230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:38,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:38,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-11-22 16:26:38,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824626300] [2021-11-22 16:26:38,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:38,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-22 16:26:38,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:38,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-22 16:26:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=4246, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 16:26:38,475 INFO L87 Difference]: Start difference. First operand 3110 states and 3448 transitions. Second operand has 70 states, 69 states have (on average 5.173913043478261) internal successors, (357), 70 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:41,614 INFO L93 Difference]: Finished difference Result 4750 states and 5240 transitions. [2021-11-22 16:26:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 16:26:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 5.173913043478261) internal successors, (357), 70 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-22 16:26:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:41,621 INFO L225 Difference]: With dead ends: 4750 [2021-11-22 16:26:41,621 INFO L226 Difference]: Without dead ends: 4750 [2021-11-22 16:26:41,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1735, Invalid=7385, Unknown=0, NotChecked=0, Total=9120 [2021-11-22 16:26:41,622 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 756 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 2448 SdHoareTripleChecker+Invalid, 3747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:41,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 2448 Invalid, 3747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-22 16:26:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2021-11-22 16:26:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 3170. [2021-11-22 16:26:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3168 states have (on average 1.1101641414141414) internal successors, (3517), 3169 states have internal predecessors, (3517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 3517 transitions. [2021-11-22 16:26:41,683 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 3517 transitions. Word has length 133 [2021-11-22 16:26:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:41,683 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 3517 transitions. [2021-11-22 16:26:41,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 5.173913043478261) internal successors, (357), 70 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 3517 transitions. [2021-11-22 16:26:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-22 16:26:41,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:41,690 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:41,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:41,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-22 16:26:41,914 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1900716246, now seen corresponding path program 14 times [2021-11-22 16:26:41,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921420939] [2021-11-22 16:26:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:41,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:42,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921420939] [2021-11-22 16:26:42,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921420939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653865898] [2021-11-22 16:26:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:26:42,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:42,616 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:42,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-22 16:26:42,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:26:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:42,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-22 16:26:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:43,427 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 [2021-11-22 16:26:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 16:26:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:44,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:26:45,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-22 16:26:45,473 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 [2021-11-22 16:26:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:26:46,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653865898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:26:46,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:26:46,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 70 [2021-11-22 16:26:46,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473629729] [2021-11-22 16:26:46,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:26:46,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-22 16:26:46,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:26:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-22 16:26:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2021-11-22 16:26:46,638 INFO L87 Difference]: Start difference. First operand 3170 states and 3517 transitions. Second operand has 70 states, 70 states have (on average 4.4) internal successors, (308), 70 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:26:50,680 INFO L93 Difference]: Finished difference Result 5389 states and 5934 transitions. [2021-11-22 16:26:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 16:26:50,681 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.4) internal successors, (308), 70 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-22 16:26:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:26:50,690 INFO L225 Difference]: With dead ends: 5389 [2021-11-22 16:26:50,690 INFO L226 Difference]: Without dead ends: 4668 [2021-11-22 16:26:50,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=682, Invalid=8248, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:26:50,692 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 893 mSDsluCounter, 6047 mSDsCounter, 0 mSdLazyCounter, 5003 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 6245 SdHoareTripleChecker+Invalid, 5363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:26:50,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 6245 Invalid, 5363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5003 Invalid, 0 Unknown, 309 Unchecked, 2.6s Time] [2021-11-22 16:26:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-11-22 16:26:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 3699. [2021-11-22 16:26:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3697 states have (on average 1.1117121990803354) internal successors, (4110), 3698 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 4110 transitions. [2021-11-22 16:26:50,769 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 4110 transitions. Word has length 139 [2021-11-22 16:26:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:26:50,769 INFO L470 AbstractCegarLoop]: Abstraction has 3699 states and 4110 transitions. [2021-11-22 16:26:50,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.4) internal successors, (308), 70 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 4110 transitions. [2021-11-22 16:26:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-22 16:26:50,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:26:50,776 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:26:50,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-22 16:26:50,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-22 16:26:50,999 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:26:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:26:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2041039411, now seen corresponding path program 8 times [2021-11-22 16:26:51,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:26:51,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406752786] [2021-11-22 16:26:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:26:51,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:26:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:26:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:51,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:26:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406752786] [2021-11-22 16:26:51,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406752786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:26:51,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896670481] [2021-11-22 16:26:51,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:26:51,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:26:51,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:26:51,538 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:26:51,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-22 16:26:51,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:26:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:26:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 16:26:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:26:51,677 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 [2021-11-22 16:26:52,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-22 16:26:52,258 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:26:52,258 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 [2021-11-22 16:26:54,288 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:26:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-22 16:26:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:26:54,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:03,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:27:03,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:27:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:27:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896670481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:04,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:04,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20] total 49 [2021-11-22 16:27:04,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662017082] [2021-11-22 16:27:04,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 16:27:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 16:27:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 16:27:04,444 INFO L87 Difference]: Start difference. First operand 3699 states and 4110 transitions. Second operand has 49 states, 49 states have (on average 6.0) internal successors, (294), 49 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:05,340 INFO L93 Difference]: Finished difference Result 6440 states and 7134 transitions. [2021-11-22 16:27:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 16:27:05,340 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.0) internal successors, (294), 49 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-22 16:27:05,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:05,348 INFO L225 Difference]: With dead ends: 6440 [2021-11-22 16:27:05,348 INFO L226 Difference]: Without dead ends: 4188 [2021-11-22 16:27:05,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2021-11-22 16:27:05,350 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 154 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:05,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 2385 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 762 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2021-11-22 16:27:05,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-11-22 16:27:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3835. [2021-11-22 16:27:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3833 states have (on average 1.1116618836420558) internal successors, (4261), 3834 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 4261 transitions. [2021-11-22 16:27:05,416 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 4261 transitions. Word has length 141 [2021-11-22 16:27:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:05,416 INFO L470 AbstractCegarLoop]: Abstraction has 3835 states and 4261 transitions. [2021-11-22 16:27:05,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.0) internal successors, (294), 49 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 4261 transitions. [2021-11-22 16:27:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-22 16:27:05,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:05,423 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:05,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:05,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:05,636 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1891650771, now seen corresponding path program 15 times [2021-11-22 16:27:05,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:05,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832848315] [2021-11-22 16:27:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:05,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:06,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:06,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832848315] [2021-11-22 16:27:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832848315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:06,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331047343] [2021-11-22 16:27:06,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:27:06,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:06,193 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:06,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-22 16:27:06,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 16:27:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:06,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 16:27:06,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:06,589 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:27:06,590 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 [2021-11-22 16:27:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 153 proven. 441 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 190 proven. 404 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331047343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:10,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2021-11-22 16:27:10,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267632525] [2021-11-22 16:27:10,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:10,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-22 16:27:10,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-22 16:27:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=5064, Unknown=0, NotChecked=0, Total=5852 [2021-11-22 16:27:10,213 INFO L87 Difference]: Start difference. First operand 3835 states and 4261 transitions. Second operand has 77 states, 76 states have (on average 5.144736842105263) internal successors, (391), 77 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) [2021-11-22 16:27:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:13,550 INFO L93 Difference]: Finished difference Result 5725 states and 6325 transitions. [2021-11-22 16:27:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-22 16:27:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 5.144736842105263) internal successors, (391), 77 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) Word has length 143 [2021-11-22 16:27:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:13,561 INFO L225 Difference]: With dead ends: 5725 [2021-11-22 16:27:13,562 INFO L226 Difference]: Without dead ends: 5725 [2021-11-22 16:27:13,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2249, Invalid=8881, Unknown=0, NotChecked=0, Total=11130 [2021-11-22 16:27:13,563 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1102 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 2671 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 1834 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2671 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 16:27:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5725 states. [2021-11-22 16:27:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5725 to 3901. [2021-11-22 16:27:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3899 states have (on average 1.1123364965375737) internal successors, (4337), 3900 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 4337 transitions. [2021-11-22 16:27:13,639 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 4337 transitions. Word has length 143 [2021-11-22 16:27:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 4337 transitions. [2021-11-22 16:27:13,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 5.144736842105263) internal successors, (391), 77 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) [2021-11-22 16:27:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 4337 transitions. [2021-11-22 16:27:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-22 16:27:13,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:13,647 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:13,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:13,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:13,861 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash -781081034, now seen corresponding path program 9 times [2021-11-22 16:27:13,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140727549] [2021-11-22 16:27:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:13,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 45 proven. 362 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:27:14,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140727549] [2021-11-22 16:27:14,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140727549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:14,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461523492] [2021-11-22 16:27:14,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:27:14,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:14,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:14,308 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:14,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-22 16:27:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 16:27:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 16:27:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:27:15,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-22 16:27:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 66 proven. 341 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:27:16,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461523492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:16,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:16,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2021-11-22 16:27:16,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117644806] [2021-11-22 16:27:16,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:16,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 16:27:16,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 16:27:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 16:27:16,419 INFO L87 Difference]: Start difference. First operand 3901 states and 4337 transitions. Second operand has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:17,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:17,851 INFO L93 Difference]: Finished difference Result 5781 states and 6403 transitions. [2021-11-22 16:27:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 16:27:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-22 16:27:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:17,858 INFO L225 Difference]: With dead ends: 5781 [2021-11-22 16:27:17,859 INFO L226 Difference]: Without dead ends: 5781 [2021-11-22 16:27:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=774, Invalid=3132, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 16:27:17,860 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 700 mSDsluCounter, 1716 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1823 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1823 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 16:27:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-11-22 16:27:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 4368. [2021-11-22 16:27:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4366 states have (on average 1.1124599175446632) internal successors, (4857), 4367 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 4857 transitions. [2021-11-22 16:27:17,936 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 4857 transitions. Word has length 145 [2021-11-22 16:27:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:17,937 INFO L470 AbstractCegarLoop]: Abstraction has 4368 states and 4857 transitions. [2021-11-22 16:27:17,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 7.913043478260869) internal successors, (364), 47 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 4857 transitions. [2021-11-22 16:27:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-22 16:27:17,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:17,944 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:17,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:18,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-22 16:27:18,160 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1331050753, now seen corresponding path program 16 times [2021-11-22 16:27:18,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:18,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539786965] [2021-11-22 16:27:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:18,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 49 proven. 618 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:18,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:18,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539786965] [2021-11-22 16:27:18,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539786965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:18,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741407270] [2021-11-22 16:27:18,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:27:18,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:18,954 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:18,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-22 16:27:19,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:27:19,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-22 16:27:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:19,157 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:27:19,158 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 [2021-11-22 16:27:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 16:27:21,342 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-22 16:27:21,342 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 [2021-11-22 16:27:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 329 proven. 338 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:21,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:23,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-22 16:27:23,126 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 [2021-11-22 16:27:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 310 proven. 357 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741407270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:25,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:25,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 85 [2021-11-22 16:27:25,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626756968] [2021-11-22 16:27:25,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:25,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-22 16:27:25,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-22 16:27:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=6527, Unknown=0, NotChecked=0, Total=7140 [2021-11-22 16:27:25,148 INFO L87 Difference]: Start difference. First operand 4368 states and 4857 transitions. Second operand has 85 states, 85 states have (on average 4.670588235294118) internal successors, (397), 85 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:41,856 INFO L93 Difference]: Finished difference Result 8647 states and 9396 transitions. [2021-11-22 16:27:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-22 16:27:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.670588235294118) internal successors, (397), 85 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-22 16:27:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:41,862 INFO L225 Difference]: With dead ends: 8647 [2021-11-22 16:27:41,862 INFO L226 Difference]: Without dead ends: 7662 [2021-11-22 16:27:41,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 257 SyntacticMatches, 12 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10535 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4797, Invalid=35003, Unknown=0, NotChecked=0, Total=39800 [2021-11-22 16:27:41,865 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 3218 mSDsluCounter, 11619 mSDsCounter, 0 mSdLazyCounter, 15182 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3218 SdHoareTripleChecker+Valid, 11978 SdHoareTripleChecker+Invalid, 17016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 15182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1570 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3218 Valid, 11978 Invalid, 17016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [264 Valid, 15182 Invalid, 0 Unknown, 1570 Unchecked, 8.3s Time] [2021-11-22 16:27:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-11-22 16:27:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 5023. [2021-11-22 16:27:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5021 states have (on average 1.1139215295757816) internal successors, (5593), 5022 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 5593 transitions. [2021-11-22 16:27:41,934 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 5593 transitions. Word has length 149 [2021-11-22 16:27:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:41,934 INFO L470 AbstractCegarLoop]: Abstraction has 5023 states and 5593 transitions. [2021-11-22 16:27:41,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.670588235294118) internal successors, (397), 85 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 5593 transitions. [2021-11-22 16:27:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-22 16:27:41,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:41,939 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:41,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:42,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:42,140 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1958061380, now seen corresponding path program 17 times [2021-11-22 16:27:42,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:42,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017332430] [2021-11-22 16:27:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:42,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 153 proven. 555 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:43,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017332430] [2021-11-22 16:27:43,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017332430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521906821] [2021-11-22 16:27:43,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:27:43,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:43,005 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:43,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-22 16:27:43,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-22 16:27:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-22 16:27:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:43,342 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:27:43,342 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 [2021-11-22 16:27:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 190 proven. 518 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:44,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 231 proven. 477 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:27:46,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521906821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:46,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:27:46,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 66 [2021-11-22 16:27:46,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855170373] [2021-11-22 16:27:46,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:46,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-22 16:27:46,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:27:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-22 16:27:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=3892, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 16:27:46,876 INFO L87 Difference]: Start difference. First operand 5023 states and 5593 transitions. Second operand has 67 states, 66 states have (on average 5.393939393939394) internal successors, (356), 67 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:50,883 INFO L93 Difference]: Finished difference Result 7239 states and 8013 transitions. [2021-11-22 16:27:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 16:27:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.393939393939394) internal successors, (356), 67 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-22 16:27:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:50,889 INFO L225 Difference]: With dead ends: 7239 [2021-11-22 16:27:50,889 INFO L226 Difference]: Without dead ends: 7239 [2021-11-22 16:27:50,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1866, Invalid=7836, Unknown=0, NotChecked=0, Total=9702 [2021-11-22 16:27:50,891 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 746 mSDsluCounter, 2845 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2979 SdHoareTripleChecker+Invalid, 4472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:50,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 2979 Invalid, 4472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-22 16:27:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7239 states. [2021-11-22 16:27:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7239 to 5095. [2021-11-22 16:27:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5095 states, 5093 states have (on average 1.1144708423326133) internal successors, (5676), 5094 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 5676 transitions. [2021-11-22 16:27:51,000 INFO L78 Accepts]: Start accepts. Automaton has 5095 states and 5676 transitions. Word has length 153 [2021-11-22 16:27:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:51,001 INFO L470 AbstractCegarLoop]: Abstraction has 5095 states and 5676 transitions. [2021-11-22 16:27:51,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.393939393939394) internal successors, (356), 67 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 5095 states and 5676 transitions. [2021-11-22 16:27:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-22 16:27:51,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:51,009 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:51,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:51,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:51,224 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:27:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1703255727, now seen corresponding path program 10 times [2021-11-22 16:27:51,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:27:51,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613318074] [2021-11-22 16:27:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:27:51,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:27:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:27:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 127 proven. 378 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:27:51,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:27:51,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613318074] [2021-11-22 16:27:51,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613318074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:27:51,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226221662] [2021-11-22 16:27:51,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:27:51,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:27:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:27:51,881 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:27:51,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-22 16:27:52,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:27:52,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-22 16:27:52,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:52,065 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:27:52,065 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 [2021-11-22 16:27:53,427 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 [2021-11-22 16:27:53,539 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-11-22 16:27:53,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-22 16:27:57,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:27:57,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2021-11-22 16:28:03,098 INFO L354 Elim1Store]: treesize reduction 189, result has 27.6 percent of original size [2021-11-22 16:28:03,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 119 [2021-11-22 16:28:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 173 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:28:03,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:08,737 INFO L354 Elim1Store]: treesize reduction 103, result has 27.0 percent of original size [2021-11-22 16:28:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 452 treesize of output 383 [2021-11-22 16:28:08,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:28:08,756 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 339 treesize of output 321 [2021-11-22 16:28:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 184 [2021-11-22 16:28:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:28:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:28:09,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:28:09,430 INFO L354 Elim1Store]: treesize reduction 9, result has 85.5 percent of original size [2021-11-22 16:28:09,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 124 [2021-11-22 16:28:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 205 proven. 311 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:28:27,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226221662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:27,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:28:27,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 44, 44] total 104 [2021-11-22 16:28:27,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190078129] [2021-11-22 16:28:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-22 16:28:27,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:28:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-22 16:28:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=10073, Unknown=0, NotChecked=0, Total=10712 [2021-11-22 16:28:27,672 INFO L87 Difference]: Start difference. First operand 5095 states and 5676 transitions. Second operand has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:54,657 INFO L93 Difference]: Finished difference Result 11744 states and 13036 transitions. [2021-11-22 16:28:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-11-22 16:28:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-22 16:28:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:54,664 INFO L225 Difference]: With dead ends: 11744 [2021-11-22 16:28:54,665 INFO L226 Difference]: Without dead ends: 11594 [2021-11-22 16:28:54,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 282 SyntacticMatches, 9 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17833 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=4045, Invalid=59207, Unknown=0, NotChecked=0, Total=63252 [2021-11-22 16:28:54,668 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1148 mSDsluCounter, 2739 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 5727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3031 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:54,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 2789 Invalid, 5727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2491 Invalid, 0 Unknown, 3031 Unchecked, 2.0s Time] [2021-11-22 16:28:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11594 states. [2021-11-22 16:28:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11594 to 9866. [2021-11-22 16:28:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9866 states, 9864 states have (on average 1.1138483373884833) internal successors, (10987), 9865 states have internal predecessors, (10987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9866 states to 9866 states and 10987 transitions. [2021-11-22 16:28:54,833 INFO L78 Accepts]: Start accepts. Automaton has 9866 states and 10987 transitions. Word has length 158 [2021-11-22 16:28:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 9866 states and 10987 transitions. [2021-11-22 16:28:54,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.346153846153846) internal successors, (452), 104 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9866 states and 10987 transitions. [2021-11-22 16:28:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-22 16:28:54,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:54,847 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:54,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-22 16:28:55,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-22 16:28:55,058 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:28:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1086593431, now seen corresponding path program 11 times [2021-11-22 16:28:55,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:28:55,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90680887] [2021-11-22 16:28:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:28:55,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:28:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:28:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:28:56,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:28:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90680887] [2021-11-22 16:28:56,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90680887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:28:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315623856] [2021-11-22 16:28:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:28:56,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:28:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:28:56,021 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:28:56,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-22 16:28:56,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-22 16:28:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-22 16:28:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:56,238 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 [2021-11-22 16:28:56,954 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 [2021-11-22 16:28:57,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-22 16:29:01,029 INFO L354 Elim1Store]: treesize reduction 71, result has 14.5 percent of original size [2021-11-22 16:29:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 38 [2021-11-22 16:29:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:29:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:04,515 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_cstrspn_~s2#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse1 |ULTIMATE.start_cstrspn_~s2#1.offset|))) (or (= .cse0 0) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) .cse0)))))) is different from false [2021-11-22 16:29:04,538 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-22 16:29:04,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-11-22 16:29:04,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:29:04,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 157 [2021-11-22 16:29:04,654 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-22 16:29:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-11-22 16:29:04,764 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-22 16:29:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2021-11-22 16:29:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:29:05,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315623856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:05,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:05,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 76 [2021-11-22 16:29:05,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184610913] [2021-11-22 16:29:05,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:05,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-22 16:29:05,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-22 16:29:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5315, Unknown=3, NotChecked=146, Total=5700 [2021-11-22 16:29:05,664 INFO L87 Difference]: Start difference. First operand 9866 states and 10987 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:29:10,518 INFO L93 Difference]: Finished difference Result 11827 states and 13153 transitions. [2021-11-22 16:29:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-22 16:29:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-22 16:29:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:29:10,528 INFO L225 Difference]: With dead ends: 11827 [2021-11-22 16:29:10,528 INFO L226 Difference]: Without dead ends: 11787 [2021-11-22 16:29:10,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=422, Invalid=8509, Unknown=3, NotChecked=186, Total=9120 [2021-11-22 16:29:10,530 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 197 mSDsluCounter, 3626 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 771 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:29:10,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 3721 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1622 Invalid, 0 Unknown, 771 Unchecked, 0.9s Time] [2021-11-22 16:29:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11787 states. [2021-11-22 16:29:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11787 to 11349. [2021-11-22 16:29:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11349 states, 11347 states have (on average 1.1128051467348197) internal successors, (12627), 11348 states have internal predecessors, (12627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11349 states to 11349 states and 12627 transitions. [2021-11-22 16:29:10,749 INFO L78 Accepts]: Start accepts. Automaton has 11349 states and 12627 transitions. Word has length 158 [2021-11-22 16:29:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:29:10,749 INFO L470 AbstractCegarLoop]: Abstraction has 11349 states and 12627 transitions. [2021-11-22 16:29:10,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 11349 states and 12627 transitions. [2021-11-22 16:29:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-22 16:29:10,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:29:10,759 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:29:10,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-22 16:29:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-22 16:29:10,960 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:29:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:29:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash -306315816, now seen corresponding path program 18 times [2021-11-22 16:29:10,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:29:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798093289] [2021-11-22 16:29:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:29:10,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:29:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 53 proven. 734 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:11,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:29:11,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798093289] [2021-11-22 16:29:11,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798093289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:29:11,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712009547] [2021-11-22 16:29:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:29:11,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:11,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:29:11,870 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:29:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-22 16:29:12,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-22 16:29:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:29:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-22 16:29:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:13,212 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 [2021-11-22 16:29:13,872 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 [2021-11-22 16:29:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 53 proven. 734 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:13,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:14,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:29:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:29:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 53 proven. 734 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712009547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:14,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 55 [2021-11-22 16:29:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32711681] [2021-11-22 16:29:14,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 16:29:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 16:29:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2808, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 16:29:14,640 INFO L87 Difference]: Start difference. First operand 11349 states and 12627 transitions. Second operand has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:29:19,147 INFO L93 Difference]: Finished difference Result 17011 states and 18817 transitions. [2021-11-22 16:29:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-22 16:29:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-22 16:29:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:29:19,161 INFO L225 Difference]: With dead ends: 17011 [2021-11-22 16:29:19,162 INFO L226 Difference]: Without dead ends: 15894 [2021-11-22 16:29:19,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=581, Invalid=6391, Unknown=0, NotChecked=0, Total=6972 [2021-11-22 16:29:19,165 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1043 mSDsluCounter, 7323 mSDsCounter, 0 mSdLazyCounter, 5514 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 7569 SdHoareTripleChecker+Invalid, 5833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 5514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:29:19,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 7569 Invalid, 5833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 5514 Invalid, 0 Unknown, 237 Unchecked, 3.0s Time] [2021-11-22 16:29:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15894 states. [2021-11-22 16:29:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15894 to 13016. [2021-11-22 16:29:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13016 states, 13014 states have (on average 1.1147226064238513) internal successors, (14507), 13015 states have internal predecessors, (14507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 14507 transitions. [2021-11-22 16:29:19,353 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 14507 transitions. Word has length 159 [2021-11-22 16:29:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:29:19,353 INFO L470 AbstractCegarLoop]: Abstraction has 13016 states and 14507 transitions. [2021-11-22 16:29:19,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 14507 transitions. [2021-11-22 16:29:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-22 16:29:19,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:29:19,366 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:29:19,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-22 16:29:19,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:19,566 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:29:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:29:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash -889628468, now seen corresponding path program 12 times [2021-11-22 16:29:19,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:29:19,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036468003] [2021-11-22 16:29:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:29:19,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:29:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 16:29:20,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:29:20,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036468003] [2021-11-22 16:29:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036468003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:29:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798087373] [2021-11-22 16:29:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:29:20,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:29:20,473 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:29:20,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-22 16:29:20,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-22 16:29:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:29:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-22 16:29:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:20,849 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 [2021-11-22 16:29:21,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-22 16:29:21,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-22 16:29:27,464 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-22 16:29:27,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 37 [2021-11-22 16:29:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 15 proven. 494 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 16:29:27,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:36,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:29:36,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 130 [2021-11-22 16:29:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-22 16:29:37,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 16:29:37,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:29:37,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 191 treesize of output 175 [2021-11-22 16:29:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 72 proven. 433 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 16:29:38,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798087373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:38,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:38,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 31] total 81 [2021-11-22 16:29:38,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307590166] [2021-11-22 16:29:38,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-22 16:29:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-22 16:29:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6196, Unknown=0, NotChecked=0, Total=6480 [2021-11-22 16:29:38,536 INFO L87 Difference]: Start difference. First operand 13016 states and 14507 transitions. Second operand has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:29:42,559 INFO L93 Difference]: Finished difference Result 16929 states and 18810 transitions. [2021-11-22 16:29:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-22 16:29:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-22 16:29:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:29:42,574 INFO L225 Difference]: With dead ends: 16929 [2021-11-22 16:29:42,575 INFO L226 Difference]: Without dead ends: 16893 [2021-11-22 16:29:42,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 276 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=580, Invalid=12530, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 16:29:42,576 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 202 mSDsluCounter, 3094 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 3165 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 634 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:29:42,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 3165 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1827 Invalid, 0 Unknown, 634 Unchecked, 1.2s Time] [2021-11-22 16:29:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-11-22 16:29:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 15519. [2021-11-22 16:29:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15519 states, 15517 states have (on average 1.1163240317071599) internal successors, (17322), 15518 states have internal predecessors, (17322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15519 states to 15519 states and 17322 transitions. [2021-11-22 16:29:42,820 INFO L78 Accepts]: Start accepts. Automaton has 15519 states and 17322 transitions. Word has length 162 [2021-11-22 16:29:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:29:42,821 INFO L470 AbstractCegarLoop]: Abstraction has 15519 states and 17322 transitions. [2021-11-22 16:29:42,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.777777777777778) internal successors, (387), 81 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15519 states and 17322 transitions. [2021-11-22 16:29:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-22 16:29:42,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:29:42,829 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:29:42,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-22 16:29:43,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-22 16:29:43,030 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:29:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:29:43,030 INFO L85 PathProgramCache]: Analyzing trace with hash 618981644, now seen corresponding path program 13 times [2021-11-22 16:29:43,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:29:43,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742332844] [2021-11-22 16:29:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:29:43,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:29:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 66 proven. 468 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:29:43,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:29:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742332844] [2021-11-22 16:29:43,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742332844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:29:43,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426642577] [2021-11-22 16:29:43,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:29:43,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:29:43,484 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:29:43,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-22 16:29:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-22 16:29:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:43,712 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:29:43,712 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 [2021-11-22 16:29:43,716 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 [2021-11-22 16:29:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 91 proven. 443 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:29:45,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 120 proven. 414 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:29:47,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426642577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:47,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:47,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-11-22 16:29:47,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892839665] [2021-11-22 16:29:47,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:47,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-22 16:29:47,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-22 16:29:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2960, Unknown=0, NotChecked=0, Total=3306 [2021-11-22 16:29:47,304 INFO L87 Difference]: Start difference. First operand 15519 states and 17322 transitions. Second operand has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:29:49,998 INFO L93 Difference]: Finished difference Result 21203 states and 23685 transitions. [2021-11-22 16:29:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 16:29:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-11-22 16:29:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:29:50,017 INFO L225 Difference]: With dead ends: 21203 [2021-11-22 16:29:50,017 INFO L226 Difference]: Without dead ends: 21203 [2021-11-22 16:29:50,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1397, Invalid=6259, Unknown=0, NotChecked=0, Total=7656 [2021-11-22 16:29:50,018 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1000 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:29:50,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1961 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 16:29:50,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21203 states. [2021-11-22 16:29:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21203 to 16158. [2021-11-22 16:29:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16158 states, 16156 states have (on average 1.1163654369893539) internal successors, (18036), 16157 states have internal predecessors, (18036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16158 states to 16158 states and 18036 transitions. [2021-11-22 16:29:50,364 INFO L78 Accepts]: Start accepts. Automaton has 16158 states and 18036 transitions. Word has length 162 [2021-11-22 16:29:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:29:50,364 INFO L470 AbstractCegarLoop]: Abstraction has 16158 states and 18036 transitions. [2021-11-22 16:29:50,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 7.719298245614035) internal successors, (440), 58 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 16158 states and 18036 transitions. [2021-11-22 16:29:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-22 16:29:50,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:29:50,377 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:29:50,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-22 16:29:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-22 16:29:50,578 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:29:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:29:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1683934629, now seen corresponding path program 19 times [2021-11-22 16:29:50,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:29:50,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306966311] [2021-11-22 16:29:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:29:50,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:29:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 190 proven. 642 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:51,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:29:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306966311] [2021-11-22 16:29:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306966311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:29:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238170396] [2021-11-22 16:29:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:29:51,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:29:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:29:51,586 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:29:51,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-22 16:29:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:29:51,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-22 16:29:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:29:51,779 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:29:51,779 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 [2021-11-22 16:29:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 231 proven. 601 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:53,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:29:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 276 proven. 556 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:29:56,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238170396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:29:56,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:29:56,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 87 [2021-11-22 16:29:56,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510119312] [2021-11-22 16:29:56,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:29:56,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-22 16:29:56,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:29:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-22 16:29:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=6751, Unknown=0, NotChecked=0, Total=7656 [2021-11-22 16:29:56,624 INFO L87 Difference]: Start difference. First operand 16158 states and 18036 transitions. Second operand has 88 states, 87 states have (on average 5.137931034482759) internal successors, (447), 88 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:02,343 INFO L93 Difference]: Finished difference Result 21192 states and 23532 transitions. [2021-11-22 16:30:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-22 16:30:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 5.137931034482759) internal successors, (447), 88 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-22 16:30:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:02,362 INFO L225 Difference]: With dead ends: 21192 [2021-11-22 16:30:02,362 INFO L226 Difference]: Without dead ends: 21192 [2021-11-22 16:30:02,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2833, Invalid=12173, Unknown=0, NotChecked=0, Total=15006 [2021-11-22 16:30:02,364 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1031 mSDsluCounter, 3862 mSDsCounter, 0 mSdLazyCounter, 6134 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 4012 SdHoareTripleChecker+Invalid, 6207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 6134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:02,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 4012 Invalid, 6207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 6134 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-22 16:30:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21192 states. [2021-11-22 16:30:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21192 to 16314. [2021-11-22 16:30:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16314 states, 16312 states have (on average 1.116785188818048) internal successors, (18217), 16313 states have internal predecessors, (18217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16314 states to 16314 states and 18217 transitions. [2021-11-22 16:30:02,696 INFO L78 Accepts]: Start accepts. Automaton has 16314 states and 18217 transitions. Word has length 163 [2021-11-22 16:30:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:02,697 INFO L470 AbstractCegarLoop]: Abstraction has 16314 states and 18217 transitions. [2021-11-22 16:30:02,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 5.137931034482759) internal successors, (447), 88 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 16314 states and 18217 transitions. [2021-11-22 16:30:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-22 16:30:02,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:02,706 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:02,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:02,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:02,907 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:30:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 898167171, now seen corresponding path program 14 times [2021-11-22 16:30:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:30:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847539244] [2021-11-22 16:30:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:02,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:30:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 16:30:03,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:30:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847539244] [2021-11-22 16:30:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847539244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:30:03,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053565998] [2021-11-22 16:30:03,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:30:03,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:30:03,597 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:30:03,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-22 16:30:03,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:30:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:30:03,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-22 16:30:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:03,803 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 [2021-11-22 16:30:04,537 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 [2021-11-22 16:30:04,638 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:30:04,639 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 [2021-11-22 16:30:07,404 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-22 16:30:07,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-22 16:30:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 16:30:07,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:16,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:30:16,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:30:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 16:30:16,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053565998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:30:16,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:30:16,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 54 [2021-11-22 16:30:16,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412690817] [2021-11-22 16:30:16,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:30:16,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-22 16:30:16,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:30:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-22 16:30:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2701, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 16:30:16,885 INFO L87 Difference]: Start difference. First operand 16314 states and 18217 transitions. Second operand has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:18,137 INFO L93 Difference]: Finished difference Result 17576 states and 19578 transitions. [2021-11-22 16:30:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 16:30:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-22 16:30:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:18,145 INFO L225 Difference]: With dead ends: 17576 [2021-11-22 16:30:18,145 INFO L226 Difference]: Without dead ends: 8264 [2021-11-22 16:30:18,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=250, Invalid=3910, Unknown=0, NotChecked=0, Total=4160 [2021-11-22 16:30:18,146 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 126 mSDsluCounter, 3295 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 3401 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:18,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 3401 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 969 Invalid, 0 Unknown, 255 Unchecked, 0.6s Time] [2021-11-22 16:30:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2021-11-22 16:30:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 6677. [2021-11-22 16:30:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6675 states have (on average 1.1164044943820224) internal successors, (7452), 6676 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 7452 transitions. [2021-11-22 16:30:18,234 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 7452 transitions. Word has length 164 [2021-11-22 16:30:18,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:18,234 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 7452 transitions. [2021-11-22 16:30:18,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.185185185185185) internal successors, (334), 54 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 7452 transitions. [2021-11-22 16:30:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-22 16:30:18,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:18,240 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:18,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:18,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-22 16:30:18,441 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:30:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2017780305, now seen corresponding path program 20 times [2021-11-22 16:30:18,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:30:18,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664414264] [2021-11-22 16:30:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:18,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:30:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 57 proven. 860 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:30:19,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:30:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664414264] [2021-11-22 16:30:19,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664414264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:30:19,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166162090] [2021-11-22 16:30:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:30:19,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:30:19,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:30:19,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-22 16:30:19,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:30:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:30:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-22 16:30:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:19,485 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:30:19,486 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 [2021-11-22 16:30:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:30:23,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:30:23,763 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 28 treesize of output 28 [2021-11-22 16:30:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 231 proven. 686 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:30:24,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:27,586 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 29 treesize of output 27 [2021-11-22 16:30:27,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-22 16:30:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 276 proven. 641 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:30:31,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166162090] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:30:31,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:30:31,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2021-11-22 16:30:31,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125147210] [2021-11-22 16:30:31,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:30:31,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-22 16:30:31,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:30:31,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-22 16:30:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=9830, Unknown=0, NotChecked=0, Total=10506 [2021-11-22 16:30:31,321 INFO L87 Difference]: Start difference. First operand 6677 states and 7452 transitions. Second operand has 103 states, 103 states have (on average 4.553398058252427) internal successors, (469), 103 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:43,534 INFO L93 Difference]: Finished difference Result 11173 states and 12499 transitions. [2021-11-22 16:30:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-22 16:30:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 4.553398058252427) internal successors, (469), 103 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-22 16:30:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:43,542 INFO L225 Difference]: With dead ends: 11173 [2021-11-22 16:30:43,542 INFO L226 Difference]: Without dead ends: 10053 [2021-11-22 16:30:43,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 339 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6867 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=2294, Invalid=28858, Unknown=0, NotChecked=0, Total=31152 [2021-11-22 16:30:43,545 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1535 mSDsluCounter, 6865 mSDsCounter, 0 mSdLazyCounter, 7329 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 7030 SdHoareTripleChecker+Invalid, 8328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 7329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 868 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:43,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 7030 Invalid, 8328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 7329 Invalid, 0 Unknown, 868 Unchecked, 4.4s Time] [2021-11-22 16:30:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10053 states. [2021-11-22 16:30:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10053 to 7608. [2021-11-22 16:30:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7606 states have (on average 1.118196160925585) internal successors, (8505), 7607 states have internal predecessors, (8505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 8505 transitions. [2021-11-22 16:30:43,703 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 8505 transitions. Word has length 169 [2021-11-22 16:30:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:43,704 INFO L470 AbstractCegarLoop]: Abstraction has 7608 states and 8505 transitions. [2021-11-22 16:30:43,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 4.553398058252427) internal successors, (469), 103 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 8505 transitions. [2021-11-22 16:30:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-22 16:30:43,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:43,711 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:43,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:43,924 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:30:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2108414055, now seen corresponding path program 15 times [2021-11-22 16:30:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:30:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137384851] [2021-11-22 16:30:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:30:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 145 proven. 500 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:30:44,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:30:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137384851] [2021-11-22 16:30:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137384851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:30:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649443919] [2021-11-22 16:30:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:30:44,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:30:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:30:44,604 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:30:44,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-22 16:30:44,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-22 16:30:44,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:30:44,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-22 16:30:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:44,946 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 [2021-11-22 16:30:45,604 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 [2021-11-22 16:30:45,681 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-22 16:30:45,682 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 [2021-11-22 16:30:50,128 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-22 16:30:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-11-22 16:30:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 22 proven. 628 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:30:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:31:07,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:31:07,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:31:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 17 proven. 633 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:31:08,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649443919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:31:08,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:31:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 29] total 71 [2021-11-22 16:31:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199648752] [2021-11-22 16:31:08,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:31:08,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-22 16:31:08,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:31:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-22 16:31:08,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4754, Unknown=0, NotChecked=0, Total=4970 [2021-11-22 16:31:08,223 INFO L87 Difference]: Start difference. First operand 7608 states and 8505 transitions. Second operand has 71 states, 71 states have (on average 5.704225352112676) internal successors, (405), 71 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:31:10,208 INFO L93 Difference]: Finished difference Result 13508 states and 15076 transitions. [2021-11-22 16:31:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 16:31:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.704225352112676) internal successors, (405), 71 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-22 16:31:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:31:10,216 INFO L225 Difference]: With dead ends: 13508 [2021-11-22 16:31:10,216 INFO L226 Difference]: Without dead ends: 8453 [2021-11-22 16:31:10,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=316, Invalid=6656, Unknown=0, NotChecked=0, Total=6972 [2021-11-22 16:31:10,217 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 193 mSDsluCounter, 4436 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 4557 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:31:10,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 4557 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1724 Invalid, 0 Unknown, 449 Unchecked, 1.0s Time] [2021-11-22 16:31:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-11-22 16:31:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 7780. [2021-11-22 16:31:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7780 states, 7778 states have (on average 1.1180251992800205) internal successors, (8696), 7779 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7780 states to 7780 states and 8696 transitions. [2021-11-22 16:31:10,319 INFO L78 Accepts]: Start accepts. Automaton has 7780 states and 8696 transitions. Word has length 175 [2021-11-22 16:31:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:31:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 7780 states and 8696 transitions. [2021-11-22 16:31:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.704225352112676) internal successors, (405), 71 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 7780 states and 8696 transitions. [2021-11-22 16:31:10,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-22 16:31:10,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:31:10,324 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 13, 13, 13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:31:10,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-22 16:31:10,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:31:10,528 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:31:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:31:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1089210502, now seen corresponding path program 21 times [2021-11-22 16:31:10,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:31:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757085419] [2021-11-22 16:31:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:31:10,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:31:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:31:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 61 proven. 996 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:11,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:31:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757085419] [2021-11-22 16:31:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757085419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:31:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396636543] [2021-11-22 16:31:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:31:11,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:31:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:31:11,681 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:31:11,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-22 16:31:12,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-22 16:31:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:31:12,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-22 16:31:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:31:13,260 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 [2021-11-22 16:31:14,054 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 [2021-11-22 16:31:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 61 proven. 996 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:14,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:31:14,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-22 16:31:14,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-22 16:31:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 61 proven. 996 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:15,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396636543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:31:15,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:31:15,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 61 [2021-11-22 16:31:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822966525] [2021-11-22 16:31:15,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:31:15,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-22 16:31:15,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:31:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-22 16:31:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3482, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 16:31:15,030 INFO L87 Difference]: Start difference. First operand 7780 states and 8696 transitions. Second operand has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:31:21,155 INFO L93 Difference]: Finished difference Result 12055 states and 13380 transitions. [2021-11-22 16:31:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-22 16:31:21,155 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-22 16:31:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:31:21,163 INFO L225 Difference]: With dead ends: 12055 [2021-11-22 16:31:21,163 INFO L226 Difference]: Without dead ends: 10327 [2021-11-22 16:31:21,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 332 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=594, Invalid=8336, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:31:21,165 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 1162 mSDsluCounter, 9584 mSDsCounter, 0 mSdLazyCounter, 7638 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 9878 SdHoareTripleChecker+Invalid, 8016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 7638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:31:21,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 9878 Invalid, 8016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 7638 Invalid, 0 Unknown, 266 Unchecked, 4.1s Time] [2021-11-22 16:31:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10327 states. [2021-11-22 16:31:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10327 to 8685. [2021-11-22 16:31:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8683 states have (on average 1.1193136012898768) internal successors, (9719), 8684 states have internal predecessors, (9719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 9719 transitions. [2021-11-22 16:31:21,326 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 9719 transitions. Word has length 179 [2021-11-22 16:31:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:31:21,327 INFO L470 AbstractCegarLoop]: Abstraction has 8685 states and 9719 transitions. [2021-11-22 16:31:21,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.672131147540983) internal successors, (285), 61 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 9719 transitions. [2021-11-22 16:31:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-22 16:31:21,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:31:21,335 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:31:21,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-22 16:31:21,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-22 16:31:21,560 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:31:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:31:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 556876508, now seen corresponding path program 16 times [2021-11-22 16:31:21,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:31:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486154510] [2021-11-22 16:31:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:31:21,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:31:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:31:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 91 proven. 587 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:31:22,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:31:22,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486154510] [2021-11-22 16:31:22,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486154510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:31:22,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427959807] [2021-11-22 16:31:22,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:31:22,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:31:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:31:22,046 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:31:22,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-22 16:31:22,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:31:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:31:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-22 16:31:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:31:22,214 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 [2021-11-22 16:31:22,219 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 [2021-11-22 16:31:23,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:31:23,416 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-22 16:31:23,416 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 [2021-11-22 16:31:27,324 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-22 16:31:27,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-11-22 16:31:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 128 proven. 550 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:31:27,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:31:31,743 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 69 treesize of output 63 [2021-11-22 16:31:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 153 proven. 525 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:31:34,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427959807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:31:34,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:31:34,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 72 [2021-11-22 16:31:34,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744442119] [2021-11-22 16:31:34,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:31:34,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-22 16:31:34,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:31:34,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-22 16:31:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=4699, Unknown=1, NotChecked=0, Total=5256 [2021-11-22 16:31:34,473 INFO L87 Difference]: Start difference. First operand 8685 states and 9719 transitions. Second operand has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:31:38,073 INFO L93 Difference]: Finished difference Result 11087 states and 12403 transitions. [2021-11-22 16:31:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 16:31:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-22 16:31:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:31:38,084 INFO L225 Difference]: With dead ends: 11087 [2021-11-22 16:31:38,084 INFO L226 Difference]: Without dead ends: 11087 [2021-11-22 16:31:38,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 325 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1097, Invalid=8214, Unknown=1, NotChecked=0, Total=9312 [2021-11-22 16:31:38,085 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 632 mSDsluCounter, 3268 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:31:38,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 3380 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1688 Invalid, 0 Unknown, 460 Unchecked, 1.1s Time] [2021-11-22 16:31:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11087 states. [2021-11-22 16:31:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11087 to 10367. [2021-11-22 16:31:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10367 states, 10365 states have (on average 1.1196333815726) internal successors, (11605), 10366 states have internal predecessors, (11605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10367 states to 10367 states and 11605 transitions. [2021-11-22 16:31:38,211 INFO L78 Accepts]: Start accepts. Automaton has 10367 states and 11605 transitions. Word has length 179 [2021-11-22 16:31:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:31:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 10367 states and 11605 transitions. [2021-11-22 16:31:38,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 6.972222222222222) internal successors, (502), 73 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:31:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10367 states and 11605 transitions. [2021-11-22 16:31:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-22 16:31:38,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:31:38,218 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:31:38,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-22 16:31:38,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-22 16:31:38,419 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:31:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:31:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1552753271, now seen corresponding path program 22 times [2021-11-22 16:31:38,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:31:38,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397741506] [2021-11-22 16:31:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:31:38,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:31:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:31:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 276 proven. 834 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:39,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:31:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397741506] [2021-11-22 16:31:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397741506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:31:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968753764] [2021-11-22 16:31:39,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:31:39,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:31:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:31:39,456 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:31:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-22 16:31:39,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:31:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:31:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-22 16:31:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:31:39,610 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:31:39,611 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 [2021-11-22 16:31:40,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-22 16:31:42,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:31:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-22 16:31:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 338 proven. 772 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:42,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:31:46,006 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 29 treesize of output 27 [2021-11-22 16:31:46,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-22 16:31:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 378 proven. 732 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:31:50,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968753764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:31:50,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:31:50,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 38] total 94 [2021-11-22 16:31:50,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250065873] [2021-11-22 16:31:50,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:31:50,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-22 16:31:50,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:31:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-22 16:31:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=921, Invalid=8009, Unknown=0, NotChecked=0, Total=8930 [2021-11-22 16:31:50,278 INFO L87 Difference]: Start difference. First operand 10367 states and 11605 transitions. Second operand has 95 states, 94 states have (on average 4.861702127659575) internal successors, (457), 95 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:32:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:32:04,872 INFO L93 Difference]: Finished difference Result 14992 states and 16602 transitions. [2021-11-22 16:32:04,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-22 16:32:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.861702127659575) internal successors, (457), 95 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-22 16:32:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:32:04,891 INFO L225 Difference]: With dead ends: 14992 [2021-11-22 16:32:04,891 INFO L226 Difference]: Without dead ends: 14992 [2021-11-22 16:32:04,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4684, Invalid=19808, Unknown=0, NotChecked=0, Total=24492 [2021-11-22 16:32:04,894 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 3444 mSDsluCounter, 5628 mSDsCounter, 0 mSdLazyCounter, 9283 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 5790 SdHoareTripleChecker+Invalid, 9896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 9283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:32:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3444 Valid, 5790 Invalid, 9896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 9283 Invalid, 0 Unknown, 373 Unchecked, 6.8s Time] [2021-11-22 16:32:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14992 states. [2021-11-22 16:32:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14992 to 10571. [2021-11-22 16:32:05,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10569 states have (on average 1.1203519727504967) internal successors, (11841), 10570 states have internal predecessors, (11841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:32:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 11841 transitions. [2021-11-22 16:32:05,150 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 11841 transitions. Word has length 183 [2021-11-22 16:32:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:32:05,150 INFO L470 AbstractCegarLoop]: Abstraction has 10571 states and 11841 transitions. [2021-11-22 16:32:05,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.861702127659575) internal successors, (457), 95 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:32:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 11841 transitions. [2021-11-22 16:32:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-22 16:32:05,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:32:05,158 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:32:05,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-22 16:32:05,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-22 16:32:05,365 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-22 16:32:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:32:05,365 INFO L85 PathProgramCache]: Analyzing trace with hash 674795569, now seen corresponding path program 23 times [2021-11-22 16:32:05,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:32:05,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125640146] [2021-11-22 16:32:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:32:05,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:32:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:32:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 663 proven. 647 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:32:06,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:32:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125640146] [2021-11-22 16:32:06,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125640146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:32:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431654540] [2021-11-22 16:32:06,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:32:06,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:32:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:32:06,092 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:32:06,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c583523-fe26-41e6-bd0b-9f7a5fc43e6b/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-22 16:32:06,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-22 16:32:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:32:06,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-22 16:32:06,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:32:06,504 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:32:06,505 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 [2021-11-22 16:32:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 748 proven. 568 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:32:09,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:32:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 748 proven. 562 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 16:32:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431654540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:32:10,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:32:10,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 36] total 91 [2021-11-22 16:32:10,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304784097] [2021-11-22 16:32:10,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:32:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-22 16:32:10,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:32:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-22 16:32:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=6803, Unknown=0, NotChecked=0, Total=8190 [2021-11-22 16:32:10,975 INFO L87 Difference]: Start difference. First operand 10571 states and 11841 transitions. Second operand has 91 states, 91 states have (on average 5.0) internal successors, (455), 91 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)