./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:29:17,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:29:17,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:29:17,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:29:17,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:29:17,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:29:17,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:29:17,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:29:17,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:29:17,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:29:17,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:29:17,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:29:17,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:29:17,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:29:17,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:29:17,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:29:17,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:29:17,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:29:18,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:29:18,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:29:18,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:29:18,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:29:18,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:29:18,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:29:18,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:29:18,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:29:18,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:29:18,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:29:18,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:29:18,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:29:18,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:29:18,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:29:18,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:29:18,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:29:18,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:29:18,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:29:18,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:29:18,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:29:18,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:29:18,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:29:18,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:29:18,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:29:18,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:29:18,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:29:18,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:29:18,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:29:18,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:29:18,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:29:18,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:29:18,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:29:18,056 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:29:18,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:29:18,057 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:29:18,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:29:18,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:29:18,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:29:18,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:29:18,058 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:29:18,058 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:29:18,058 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:29:18,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:29:18,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:29:18,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:29:18,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:29:18,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:29:18,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:29:18,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:29:18,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:18,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:29:18,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:29:18,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:29:18,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:29:18,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:29:18,061 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_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-11-20 07:29:18,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:29:18,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:29:18,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:29:18,388 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:29:18,389 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:29:18,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-11-20 07:29:18,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/data/16e8aa1ef/2b8859e5e53d4e7da5d9800689d11209/FLAG17161d727 [2021-11-20 07:29:18,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:29:18,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-11-20 07:29:18,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/data/16e8aa1ef/2b8859e5e53d4e7da5d9800689d11209/FLAG17161d727 [2021-11-20 07:29:19,279 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/data/16e8aa1ef/2b8859e5e53d4e7da5d9800689d11209 [2021-11-20 07:29:19,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:29:19,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:29:19,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:19,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:29:19,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:29:19,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a640076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19, skipping insertion in model container [2021-11-20 07:29:19,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:29:19,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:29:19,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:19,745 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:29:19,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:19,810 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:29:19,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19 WrapperNode [2021-11-20 07:29:19,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:19,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:19,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:29:19,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:29:19,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,856 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-11-20 07:29:19,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:19,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:29:19,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:29:19,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:29:19,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:29:19,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:29:19,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:29:19,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:29:19,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (1/1) ... [2021-11-20 07:29:19,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:19,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:29:19,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:29:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:29:19,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:29:19,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:29:19,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:29:19,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:29:19,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:29:20,057 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:29:20,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:29:20,244 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:29:20,250 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:29:20,251 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:29:20,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:20 BoogieIcfgContainer [2021-11-20 07:29:20,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:29:20,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:29:20,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:29:20,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:29:20,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:29:19" (1/3) ... [2021-11-20 07:29:20,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29514b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:20, skipping insertion in model container [2021-11-20 07:29:20,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:19" (2/3) ... [2021-11-20 07:29:20,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29514b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:20, skipping insertion in model container [2021-11-20 07:29:20,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:20" (3/3) ... [2021-11-20 07:29:20,260 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-11-20 07:29:20,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:29:20,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-20 07:29:20,350 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:29:20,370 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:29:20,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-20 07:29:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:29:20,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:20,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:20,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-20 07:29:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29037487] [2021-11-20 07:29:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:20,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:20,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29037487] [2021-11-20 07:29:20,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29037487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:20,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:20,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:29:20,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410660820] [2021-11-20 07:29:20,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:20,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:20,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:20,713 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:20,823 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-11-20 07:29:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:20,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:29:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:20,837 INFO L225 Difference]: With dead ends: 78 [2021-11-20 07:29:20,838 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 07:29:20,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:20,847 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:20,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 07:29:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-11-20 07:29:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-20 07:29:20,897 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-11-20 07:29:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:20,899 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-20 07:29:20,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-20 07:29:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:29:20,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:20,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:20,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:29:20,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-20 07:29:20,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091960134] [2021-11-20 07:29:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:20,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091960134] [2021-11-20 07:29:21,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091960134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:29:21,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077667010] [2021-11-20 07:29:21,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:29:21,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:29:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:29:21,034 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,076 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-20 07:29:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:29:21,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:29:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,077 INFO L225 Difference]: With dead ends: 42 [2021-11-20 07:29:21,078 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 07:29:21,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:29:21,080 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:21,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 07:29:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 07:29:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-20 07:29:21,087 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-11-20 07:29:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,087 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-20 07:29:21,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-20 07:29:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:29:21,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:29:21,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-20 07:29:21,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541211567] [2021-11-20 07:29:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541211567] [2021-11-20 07:29:21,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541211567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:29:21,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220278214] [2021-11-20 07:29:21,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:21,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:21,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:21,166 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,270 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-20 07:29:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:29:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,275 INFO L225 Difference]: With dead ends: 75 [2021-11-20 07:29:21,275 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 07:29:21,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:29:21,283 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 07:29:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-11-20 07:29:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-11-20 07:29:21,291 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-11-20 07:29:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,291 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-11-20 07:29:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-11-20 07:29:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:29:21,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:29:21,293 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-20 07:29:21,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038473611] [2021-11-20 07:29:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038473611] [2021-11-20 07:29:21,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038473611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:29:21,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247099413] [2021-11-20 07:29:21,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:21,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:21,405 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,453 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-11-20 07:29:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 07:29:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,457 INFO L225 Difference]: With dead ends: 43 [2021-11-20 07:29:21,458 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 07:29:21,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:21,464 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 07:29:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-20 07:29:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-20 07:29:21,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2021-11-20 07:29:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,470 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-20 07:29:21,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-20 07:29:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:29:21,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:29:21,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-20 07:29:21,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798093236] [2021-11-20 07:29:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798093236] [2021-11-20 07:29:21,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798093236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:29:21,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046423228] [2021-11-20 07:29:21,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:21,564 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,606 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-11-20 07:29:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 07:29:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,609 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:29:21,610 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 07:29:21,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:21,612 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 07:29:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-11-20 07:29:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-11-20 07:29:21,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2021-11-20 07:29:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,632 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-11-20 07:29:21,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-11-20 07:29:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:29:21,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:29:21,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-20 07:29:21,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607987617] [2021-11-20 07:29:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607987617] [2021-11-20 07:29:21,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607987617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:29:21,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625336136] [2021-11-20 07:29:21,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:29:21,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:29:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:29:21,696 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,718 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-20 07:29:21,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:29:21,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 07:29:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,720 INFO L225 Difference]: With dead ends: 52 [2021-11-20 07:29:21,720 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 07:29:21,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:29:21,723 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 07:29:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-20 07:29:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-20 07:29:21,743 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2021-11-20 07:29:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,743 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-20 07:29:21,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-20 07:29:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:29:21,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:29:21,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-20 07:29:21,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911203286] [2021-11-20 07:29:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:21,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911203286] [2021-11-20 07:29:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911203286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:21,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:21,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:29:21,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111782235] [2021-11-20 07:29:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:21,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:29:21,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:29:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:29:21,861 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:21,938 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-11-20 07:29:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:29:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 07:29:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:21,939 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:29:21,941 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 07:29:21,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:29:21,944 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:21,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 07:29:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-11-20 07:29:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) 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) [2021-11-20 07:29:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-11-20 07:29:21,959 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-11-20 07:29:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:21,959 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-11-20 07:29:21,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-11-20 07:29:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:29:21,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:21,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:21,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:29:21,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-20 07:29:21,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:21,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806601630] [2021-11-20 07:29:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:21,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:22,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:22,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806601630] [2021-11-20 07:29:22,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806601630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:22,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:29:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557929735] [2021-11-20 07:29:22,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:22,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:22,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:22,035 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:22,057 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-11-20 07:29:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 07:29:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:22,058 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:29:22,058 INFO L226 Difference]: Without dead ends: 53 [2021-11-20 07:29:22,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:22,059 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:22,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-20 07:29:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-20 07:29:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-11-20 07:29:22,063 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-11-20 07:29:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-20 07:29:22,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-11-20 07:29:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:29:22,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:22,065 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:22,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:29:22,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-20 07:29:22,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:22,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854934911] [2021-11-20 07:29:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:22,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:22,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854934911] [2021-11-20 07:29:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854934911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194660160] [2021-11-20 07:29:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:22,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:22,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:22,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:29:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:22,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:29:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:22,389 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:29:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 07:29:22,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:29:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:22,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:22,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194660160] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:22,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:22,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 07:29:22,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596888660] [2021-11-20 07:29:22,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:22,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:29:22,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:29:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:29:22,783 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:22,976 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-11-20 07:29:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:29:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 07:29:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:22,978 INFO L225 Difference]: With dead ends: 116 [2021-11-20 07:29:22,979 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:29:22,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:29:22,983 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 174 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:22,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 183 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:22,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:29:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-11-20 07:29:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-20 07:29:22,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-11-20 07:29:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:22,990 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-20 07:29:22,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-20 07:29:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:29:22,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:22,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:23,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:23,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:29:23,214 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-11-20 07:29:23,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:23,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611806589] [2021-11-20 07:29:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:23,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:23,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:23,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611806589] [2021-11-20 07:29:23,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611806589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:23,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:23,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:29:23,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767431311] [2021-11-20 07:29:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:23,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:29:23,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:29:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:29:23,270 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:23,315 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-11-20 07:29:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:29:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 07:29:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:23,316 INFO L225 Difference]: With dead ends: 47 [2021-11-20 07:29:23,316 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:29:23,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:29:23,317 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:29:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-20 07:29:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-20 07:29:23,321 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-11-20 07:29:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-20 07:29:23,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-20 07:29:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:29:23,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:23,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:23,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:29:23,323 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-11-20 07:29:23,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:23,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196713679] [2021-11-20 07:29:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:23,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:23,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:23,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196713679] [2021-11-20 07:29:23,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196713679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:23,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:23,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:29:23,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64960587] [2021-11-20 07:29:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:23,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:29:23,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:23,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:29:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:29:23,393 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:23,462 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-20 07:29:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:29:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 07:29:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:23,464 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:29:23,464 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 07:29:23,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:29:23,465 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:23,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 07:29:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-20 07:29:23,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-11-20 07:29:23,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-11-20 07:29:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:23,468 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-11-20 07:29:23,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-11-20 07:29:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:29:23,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:23,469 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:23,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:29:23,470 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-20 07:29:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804889000] [2021-11-20 07:29:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:23,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:23,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804889000] [2021-11-20 07:29:23,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804889000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:23,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256421058] [2021-11-20 07:29:23,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:23,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:23,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:23,534 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:29:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:29:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:23,621 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:29:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:29:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:23,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:23,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256421058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:23,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:23,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-20 07:29:23,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248831686] [2021-11-20 07:29:23,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:29:23,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:29:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:29:23,971 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:24,122 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-11-20 07:29:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:29:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 07:29:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:24,123 INFO L225 Difference]: With dead ends: 91 [2021-11-20 07:29:24,124 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 07:29:24,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:29:24,125 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 166 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:24,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 170 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 07:29:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-11-20 07:29:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-20 07:29:24,128 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-11-20 07:29:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:24,128 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-20 07:29:24,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-20 07:29:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:29:24,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:24,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:24,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 07:29:24,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:24,357 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-11-20 07:29:24,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:24,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276860006] [2021-11-20 07:29:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:24,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:24,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:24,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276860006] [2021-11-20 07:29:24,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276860006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:24,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:24,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:29:24,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465090436] [2021-11-20 07:29:24,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:24,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:29:24,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:29:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:29:24,394 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:24,446 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-20 07:29:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:29:24,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 07:29:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:24,447 INFO L225 Difference]: With dead ends: 46 [2021-11-20 07:29:24,447 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 07:29:24,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:29:24,448 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:24,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 07:29:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-20 07:29:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-20 07:29:24,451 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-11-20 07:29:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:24,451 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-20 07:29:24,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-20 07:29:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:29:24,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:24,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:24,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:29:24,452 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-11-20 07:29:24,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276587941] [2021-11-20 07:29:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:24,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:24,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:24,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276587941] [2021-11-20 07:29:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276587941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:24,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:24,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:29:24,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243324341] [2021-11-20 07:29:24,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:24,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:29:24,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:29:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:29:24,545 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:24,632 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-20 07:29:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:29:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 07:29:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:24,633 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:29:24,634 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:29:24,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:29:24,634 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:24,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 85 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:29:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-11-20 07:29:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-20 07:29:24,637 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-11-20 07:29:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:24,637 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-20 07:29:24,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-20 07:29:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:29:24,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:24,638 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] [2021-11-20 07:29:24,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:29:24,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-11-20 07:29:24,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:24,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410659837] [2021-11-20 07:29:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:24,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:24,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:24,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410659837] [2021-11-20 07:29:24,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410659837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:24,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:24,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:29:24,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870726501] [2021-11-20 07:29:24,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:24,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:29:24,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:29:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:24,741 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:24,759 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-20 07:29:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:29:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 07:29:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:24,761 INFO L225 Difference]: With dead ends: 46 [2021-11-20 07:29:24,761 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 07:29:24,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:29:24,765 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:24,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:29:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 07:29:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-20 07:29:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-20 07:29:24,769 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-11-20 07:29:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:24,769 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-20 07:29:24,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-20 07:29:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:29:24,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:24,770 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:24,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:29:24,771 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-11-20 07:29:24,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998424273] [2021-11-20 07:29:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:24,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:24,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998424273] [2021-11-20 07:29:24,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998424273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:24,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:24,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:29:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097484526] [2021-11-20 07:29:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:24,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:29:24,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:29:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:29:24,938 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:25,094 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-11-20 07:29:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:29:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 07:29:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:25,095 INFO L225 Difference]: With dead ends: 53 [2021-11-20 07:29:25,095 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:29:25,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:29:25,096 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:25,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:29:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 07:29:25,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-20 07:29:25,098 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-11-20 07:29:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:25,098 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-20 07:29:25,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-20 07:29:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:29:25,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:25,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:25,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:29:25,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:25,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-11-20 07:29:25,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14626513] [2021-11-20 07:29:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:25,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:25,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14626513] [2021-11-20 07:29:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14626513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:25,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:25,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 07:29:25,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857244485] [2021-11-20 07:29:25,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:29:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:29:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:29:25,264 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:25,424 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-20 07:29:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:29:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 07:29:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:25,425 INFO L225 Difference]: With dead ends: 48 [2021-11-20 07:29:25,425 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 07:29:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:29:25,426 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 07:29:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-20 07:29:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-20 07:29:25,428 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-11-20 07:29:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:25,428 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-20 07:29:25,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-20 07:29:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:29:25,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:25,429 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:25,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:29:25,429 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-11-20 07:29:25,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:25,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636893184] [2021-11-20 07:29:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:25,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:25,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636893184] [2021-11-20 07:29:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636893184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:25,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094535978] [2021-11-20 07:29:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:25,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:25,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:25,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:29:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:29:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:25,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:26,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:29:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:26,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094535978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:26,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:26,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-11-20 07:29:26,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222168743] [2021-11-20 07:29:26,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:29:26,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:29:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:29:26,106 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:26,468 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-20 07:29:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:29:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 07:29:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:26,469 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:29:26,469 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 07:29:26,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:29:26,471 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 219 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:26,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 193 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:29:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 07:29:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-20 07:29:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-20 07:29:26,474 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-11-20 07:29:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:26,474 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-20 07:29:26,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-20 07:29:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:29:26,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:26,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:26,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:26,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:29:26,689 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-11-20 07:29:26,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729828938] [2021-11-20 07:29:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:26,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:26,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729828938] [2021-11-20 07:29:26,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729828938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:26,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:26,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:29:26,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280351422] [2021-11-20 07:29:26,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:26,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:29:26,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:29:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:29:26,876 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:27,033 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-11-20 07:29:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:29:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 07:29:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:27,043 INFO L225 Difference]: With dead ends: 65 [2021-11-20 07:29:27,043 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 07:29:27,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:29:27,044 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:27,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 172 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 07:29:27,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-20 07:29:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-11-20 07:29:27,052 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-11-20 07:29:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:27,053 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-11-20 07:29:27,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-11-20 07:29:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:29:27,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:27,054 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:27,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:29:27,054 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-11-20 07:29:27,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323619594] [2021-11-20 07:29:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:27,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:27,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323619594] [2021-11-20 07:29:27,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323619594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:27,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:27,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 07:29:27,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823307275] [2021-11-20 07:29:27,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:27,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:29:27,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:29:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:29:27,225 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:27,449 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-11-20 07:29:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:29:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 07:29:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:27,450 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:29:27,450 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:29:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:29:27,451 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:27,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 170 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:29:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-11-20 07:29:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-20 07:29:27,455 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-11-20 07:29:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:27,456 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-20 07:29:27,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-20 07:29:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:29:27,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:27,457 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:27,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:29:27,458 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-11-20 07:29:27,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535162684] [2021-11-20 07:29:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:27,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:27,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:27,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535162684] [2021-11-20 07:29:27,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535162684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:27,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70685178] [2021-11-20 07:29:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:27,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:27,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:29:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:29:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:27,721 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:29:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-20 07:29:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:29:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:27,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:28,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70685178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:28,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:28,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-11-20 07:29:28,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195243512] [2021-11-20 07:29:28,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:28,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:29:28,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:29:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:29:28,270 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:28,723 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-11-20 07:29:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:29:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 07:29:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:28,725 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:29:28,725 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 07:29:28,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:29:28,726 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 203 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:28,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 218 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:29:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 07:29:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-11-20 07:29:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-20 07:29:28,729 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-11-20 07:29:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:28,729 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-20 07:29:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:28,730 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-20 07:29:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:29:28,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:28,731 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:28,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:28,945 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-11-20 07:29:28,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:28,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703246496] [2021-11-20 07:29:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:28,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:29,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:29,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703246496] [2021-11-20 07:29:29,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703246496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373086549] [2021-11-20 07:29:29,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:29,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:29,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:29,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:29:29,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:29,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:29,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 07:29:29,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:29,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:29:30,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:30,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:29:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:30,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:31,297 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 [2021-11-20 07:29:31,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 07:29:31,319 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 [2021-11-20 07:29:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:31,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373086549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:31,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:31,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-11-20 07:29:31,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982516921] [2021-11-20 07:29:31,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:29:31,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:31,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:29:31,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:29:31,375 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:32,083 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-20 07:29:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:29:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 07:29:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:32,086 INFO L225 Difference]: With dead ends: 140 [2021-11-20 07:29:32,086 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:29:32,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:29:32,089 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:32,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 399 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 182 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-11-20 07:29:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:29:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2021-11-20 07:29:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-11-20 07:29:32,096 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2021-11-20 07:29:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:32,096 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-11-20 07:29:32,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:32,097 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-11-20 07:29:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:29:32,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:32,098 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:32,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:32,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 07:29:32,317 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-11-20 07:29:32,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:32,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068333685] [2021-11-20 07:29:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:32,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:32,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:32,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068333685] [2021-11-20 07:29:32,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068333685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:32,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117942535] [2021-11-20 07:29:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:32,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:32,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:29:32,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:32,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 07:29:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:29:32,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:29:33,028 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:29:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-20 07:29:33,961 INFO L354 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2021-11-20 07:29:33,961 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 39 [2021-11-20 07:29:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:34,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:36,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2021-11-20 07:29:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-11-20 07:29:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:36,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117942535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:36,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:36,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-11-20 07:29:36,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143405711] [2021-11-20 07:29:36,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:36,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 07:29:36,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 07:29:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1425, Unknown=1, NotChecked=0, Total=1560 [2021-11-20 07:29:36,810 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:38,859 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2021-11-20 07:29:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:29:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 07:29:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:38,862 INFO L225 Difference]: With dead ends: 196 [2021-11-20 07:29:38,862 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 07:29:38,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=404, Invalid=3377, Unknown=1, NotChecked=0, Total=3782 [2021-11-20 07:29:38,865 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 184 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:38,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 704 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 379 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2021-11-20 07:29:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 07:29:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 175. [2021-11-20 07:29:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.1445086705202312) internal successors, (198), 174 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2021-11-20 07:29:38,873 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 37 [2021-11-20 07:29:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:38,873 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2021-11-20 07:29:38,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 40 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2021-11-20 07:29:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:29:38,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:38,875 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:38,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:39,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:29:39,101 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2021-11-20 07:29:39,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:39,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207120685] [2021-11-20 07:29:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:39,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:39,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:39,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207120685] [2021-11-20 07:29:39,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207120685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:39,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630407957] [2021-11-20 07:29:39,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:29:39,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:39,396 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:39,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:29:39,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:29:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 07:29:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:39,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:29:39,842 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 11 treesize of output 7 [2021-11-20 07:29:39,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 07:29:40,712 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 07:29:40,713 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 23 [2021-11-20 07:29:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:40,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:41,582 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 2)) 0)) is different from false [2021-11-20 07:29:41,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:41,593 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-20 07:29:41,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-20 07:29:41,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:29:41,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:41,639 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 44 treesize of output 48 [2021-11-20 07:29:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:41,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630407957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:41,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:41,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2021-11-20 07:29:41,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320964211] [2021-11-20 07:29:41,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:41,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:29:41,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:29:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1507, Unknown=1, NotChecked=78, Total=1722 [2021-11-20 07:29:41,927 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:43,321 INFO L93 Difference]: Finished difference Result 408 states and 448 transitions. [2021-11-20 07:29:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:29:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 07:29:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:43,325 INFO L225 Difference]: With dead ends: 408 [2021-11-20 07:29:43,325 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 07:29:43,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=367, Invalid=3796, Unknown=1, NotChecked=126, Total=4290 [2021-11-20 07:29:43,328 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 125 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:43,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 821 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 542 Invalid, 0 Unknown, 288 Unchecked, 0.4s Time] [2021-11-20 07:29:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 07:29:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 209. [2021-11-20 07:29:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2021-11-20 07:29:43,338 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 39 [2021-11-20 07:29:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:43,338 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2021-11-20 07:29:43,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2021-11-20 07:29:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:29:43,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:43,340 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:43,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:43,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:43,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-11-20 07:29:43,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484772490] [2021-11-20 07:29:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:43,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:43,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484772490] [2021-11-20 07:29:43,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484772490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718304266] [2021-11-20 07:29:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:43,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:43,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:43,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:43,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:29:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 07:29:43,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:43,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:29:44,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:29:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:45,975 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 [2021-11-20 07:29:45,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 07:29:45,981 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 [2021-11-20 07:29:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:29:46,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718304266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:46,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:46,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-11-20 07:29:46,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87149562] [2021-11-20 07:29:46,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:46,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 07:29:46,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 07:29:46,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:29:46,051 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:47,279 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2021-11-20 07:29:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:29:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 07:29:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:47,281 INFO L225 Difference]: With dead ends: 295 [2021-11-20 07:29:47,282 INFO L226 Difference]: Without dead ends: 264 [2021-11-20 07:29:47,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=3087, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:29:47,284 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:47,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 380 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2021-11-20 07:29:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-20 07:29:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 233. [2021-11-20 07:29:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-11-20 07:29:47,293 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 42 [2021-11-20 07:29:47,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:47,294 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-11-20 07:29:47,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-11-20 07:29:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:29:47,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:47,296 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:47,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:47,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:29:47,521 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2021-11-20 07:29:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151053574] [2021-11-20 07:29:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:47,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:47,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151053574] [2021-11-20 07:29:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151053574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:47,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934491384] [2021-11-20 07:29:47,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:29:47,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:47,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:47,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:29:47,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:29:47,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:29:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:47,899 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:29:47,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:29:48,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:29:48,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:29:48,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:29:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:48,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:49,440 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 [2021-11-20 07:29:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-20 07:29:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:50,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934491384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:50,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:29:50,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2021-11-20 07:29:50,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362678494] [2021-11-20 07:29:50,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:50,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 07:29:50,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 07:29:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:29:50,246 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:52,489 INFO L93 Difference]: Finished difference Result 373 states and 413 transitions. [2021-11-20 07:29:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:29:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 07:29:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:52,492 INFO L225 Difference]: With dead ends: 373 [2021-11-20 07:29:52,493 INFO L226 Difference]: Without dead ends: 373 [2021-11-20 07:29:52,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=886, Invalid=4084, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 07:29:52,496 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 473 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:52,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 600 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 698 Invalid, 0 Unknown, 137 Unchecked, 0.5s Time] [2021-11-20 07:29:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-20 07:29:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 266. [2021-11-20 07:29:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 264 states have (on average 1.1325757575757576) internal successors, (299), 265 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 299 transitions. [2021-11-20 07:29:52,508 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 299 transitions. Word has length 43 [2021-11-20 07:29:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:52,509 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 299 transitions. [2021-11-20 07:29:52,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6744186046511627) internal successors, (115), 44 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 299 transitions. [2021-11-20 07:29:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:29:52,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:52,510 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-20 07:29:52,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:52,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:29:52,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:29:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 3 times [2021-11-20 07:29:52,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636649760] [2021-11-20 07:29:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:52,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:53,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636649760] [2021-11-20 07:29:53,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636649760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:29:53,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836133076] [2021-11-20 07:29:53,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:29:53,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:29:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:53,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:29:53,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:29:53,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:29:53,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-20 07:29:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:29:53,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:29:54,013 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:29:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:29:54,801 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:29:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:29:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:05,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:30:05,153 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 26 treesize of output 22 [2021-11-20 07:30:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:30:05,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836133076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:05,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 15] total 50 [2021-11-20 07:30:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474617476] [2021-11-20 07:30:05,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:05,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:30:05,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:30:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2303, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:30:05,430 INFO L87 Difference]: Start difference. First operand 266 states and 299 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:07,419 INFO L93 Difference]: Finished difference Result 425 states and 469 transitions. [2021-11-20 07:30:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:30:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-20 07:30:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:07,422 INFO L225 Difference]: With dead ends: 425 [2021-11-20 07:30:07,422 INFO L226 Difference]: Without dead ends: 398 [2021-11-20 07:30:07,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=436, Invalid=5884, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 07:30:07,425 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 241 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:07,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1631 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 844 Invalid, 0 Unknown, 563 Unchecked, 0.5s Time] [2021-11-20 07:30:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-20 07:30:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 336. [2021-11-20 07:30:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 334 states have (on average 1.1347305389221556) internal successors, (379), 335 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 379 transitions. [2021-11-20 07:30:07,437 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 379 transitions. Word has length 49 [2021-11-20 07:30:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:07,437 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 379 transitions. [2021-11-20 07:30:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 379 transitions. [2021-11-20 07:30:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:30:07,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:07,439 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:07,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:07,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:07,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash -839474363, now seen corresponding path program 2 times [2021-11-20 07:30:07,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:07,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740889196] [2021-11-20 07:30:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:07,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:30:08,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740889196] [2021-11-20 07:30:08,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740889196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22012771] [2021-11-20 07:30:08,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:30:08,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:08,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:08,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:08,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:30:08,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:30:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 07:30:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:08,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:30:09,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:30:09,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:30:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:09,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:10,582 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 [2021-11-20 07:30:10,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 07:30:10,587 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 38 treesize of output 30 [2021-11-20 07:30:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:10,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22012771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:10,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:10,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 46 [2021-11-20 07:30:10,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254757640] [2021-11-20 07:30:10,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:10,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:30:10,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:30:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:30:10,645 INFO L87 Difference]: Start difference. First operand 336 states and 379 transitions. Second operand has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:12,926 INFO L93 Difference]: Finished difference Result 436 states and 482 transitions. [2021-11-20 07:30:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:30:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 07:30:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:12,930 INFO L225 Difference]: With dead ends: 436 [2021-11-20 07:30:12,930 INFO L226 Difference]: Without dead ends: 401 [2021-11-20 07:30:12,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=517, Invalid=5803, Unknown=0, NotChecked=0, Total=6320 [2021-11-20 07:30:12,932 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:12,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 883 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 603 Invalid, 0 Unknown, 408 Unchecked, 0.3s Time] [2021-11-20 07:30:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-20 07:30:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 330. [2021-11-20 07:30:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 328 states have (on average 1.1371951219512195) internal successors, (373), 329 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 373 transitions. [2021-11-20 07:30:12,946 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 373 transitions. Word has length 51 [2021-11-20 07:30:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:12,946 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 373 transitions. [2021-11-20 07:30:12,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 373 transitions. [2021-11-20 07:30:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:30:12,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:12,948 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:12,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:13,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:30:13,161 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:13,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2021-11-20 07:30:13,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:13,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568585446] [2021-11-20 07:30:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:13,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:13,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568585446] [2021-11-20 07:30:13,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568585446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598935401] [2021-11-20 07:30:13,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:30:13,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:13,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:13,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:13,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:30:13,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:30:13,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:30:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:13,472 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:30:13,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:30:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:14,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:14,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598935401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:14,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:14,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2021-11-20 07:30:14,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806357179] [2021-11-20 07:30:14,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 07:30:14,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:14,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 07:30:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:30:14,413 INFO L87 Difference]: Start difference. First operand 330 states and 373 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:15,465 INFO L93 Difference]: Finished difference Result 757 states and 833 transitions. [2021-11-20 07:30:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:30:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 07:30:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:15,470 INFO L225 Difference]: With dead ends: 757 [2021-11-20 07:30:15,470 INFO L226 Difference]: Without dead ends: 723 [2021-11-20 07:30:15,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:30:15,472 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 318 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:15,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 660 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:30:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-20 07:30:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 500. [2021-11-20 07:30:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 498 states have (on average 1.1365461847389557) internal successors, (566), 499 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 566 transitions. [2021-11-20 07:30:15,491 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 566 transitions. Word has length 53 [2021-11-20 07:30:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 566 transitions. [2021-11-20 07:30:15,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 566 transitions. [2021-11-20 07:30:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:30:15,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:15,494 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-20 07:30:15,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:15,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:30:15,721 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 4 times [2021-11-20 07:30:15,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095924084] [2021-11-20 07:30:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:15,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:30:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095924084] [2021-11-20 07:30:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095924084] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147076869] [2021-11-20 07:30:15,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:15,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:15,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:15,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:15,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:30:16,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:30:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:16,070 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:30:16,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:30:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:30:16,581 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:30:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 07:30:17,271 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 07:30:17,272 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 25 [2021-11-20 07:30:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:17,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-20 07:30:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:22,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147076869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:22,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:22,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 21] total 51 [2021-11-20 07:30:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906588530] [2021-11-20 07:30:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:22,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:30:22,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:30:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2388, Unknown=2, NotChecked=0, Total=2652 [2021-11-20 07:30:22,327 INFO L87 Difference]: Start difference. First operand 500 states and 566 transitions. Second operand has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:26,130 INFO L93 Difference]: Finished difference Result 676 states and 751 transitions. [2021-11-20 07:30:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 07:30:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-20 07:30:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:26,134 INFO L225 Difference]: With dead ends: 676 [2021-11-20 07:30:26,134 INFO L226 Difference]: Without dead ends: 676 [2021-11-20 07:30:26,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1278, Invalid=7840, Unknown=2, NotChecked=0, Total=9120 [2021-11-20 07:30:26,137 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 485 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:26,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 1252 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1173 Invalid, 0 Unknown, 350 Unchecked, 0.7s Time] [2021-11-20 07:30:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-20 07:30:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 564. [2021-11-20 07:30:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 562 states have (on average 1.1370106761565837) internal successors, (639), 563 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 639 transitions. [2021-11-20 07:30:26,157 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 639 transitions. Word has length 53 [2021-11-20 07:30:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:26,158 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 639 transitions. [2021-11-20 07:30:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 639 transitions. [2021-11-20 07:30:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:30:26,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:26,159 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:26,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:26,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:26,373 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2021-11-20 07:30:26,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:26,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980258251] [2021-11-20 07:30:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:26,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:26,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980258251] [2021-11-20 07:30:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980258251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139010311] [2021-11-20 07:30:26,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:30:26,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:26,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:26,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:30:26,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-20 07:30:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 07:30:26,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:27,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:30:27,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:30:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:27,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:27,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:30:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:30:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139010311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:27,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:27,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2021-11-20 07:30:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062005471] [2021-11-20 07:30:27,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:27,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:30:27,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:30:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:30:27,664 INFO L87 Difference]: Start difference. First operand 564 states and 639 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:28,776 INFO L93 Difference]: Finished difference Result 1045 states and 1163 transitions. [2021-11-20 07:30:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:30:28,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-20 07:30:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:28,784 INFO L225 Difference]: With dead ends: 1045 [2021-11-20 07:30:28,784 INFO L226 Difference]: Without dead ends: 997 [2021-11-20 07:30:28,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=383, Invalid=2373, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:30:28,786 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 386 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:28,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 1213 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 968 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2021-11-20 07:30:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-20 07:30:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 580. [2021-11-20 07:30:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 578 states have (on average 1.1384083044982698) internal successors, (658), 579 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 658 transitions. [2021-11-20 07:30:28,812 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 658 transitions. Word has length 57 [2021-11-20 07:30:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:28,813 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 658 transitions. [2021-11-20 07:30:28,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 658 transitions. [2021-11-20 07:30:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:30:28,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:28,815 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:28,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:29,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:30:29,029 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:29,029 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2021-11-20 07:30:29,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:29,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581012866] [2021-11-20 07:30:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:29,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:29,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:29,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581012866] [2021-11-20 07:30:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581012866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:29,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846616609] [2021-11-20 07:30:29,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:29,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:29,377 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:29,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:30:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:30:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 07:30:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:30:29,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:30:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:29,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:30,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:30:30,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:30:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846616609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:30,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-11-20 07:30:30,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848060088] [2021-11-20 07:30:30,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:30,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:30:30,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:30:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:30:30,227 INFO L87 Difference]: Start difference. First operand 580 states and 658 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:30,931 INFO L93 Difference]: Finished difference Result 950 states and 1057 transitions. [2021-11-20 07:30:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:30:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 07:30:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:30,936 INFO L225 Difference]: With dead ends: 950 [2021-11-20 07:30:30,936 INFO L226 Difference]: Without dead ends: 828 [2021-11-20 07:30:30,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:30:30,937 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 171 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:30,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 742 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 610 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2021-11-20 07:30:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-20 07:30:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 657. [2021-11-20 07:30:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 655 states have (on average 1.132824427480916) internal successors, (742), 656 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 742 transitions. [2021-11-20 07:30:30,958 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 742 transitions. Word has length 60 [2021-11-20 07:30:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:30,959 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 742 transitions. [2021-11-20 07:30:30,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 742 transitions. [2021-11-20 07:30:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:30:30,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:30,961 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:30,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:31,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:31,177 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -27203543, now seen corresponding path program 4 times [2021-11-20 07:30:31,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:31,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777590857] [2021-11-20 07:30:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:31,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:30:31,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777590857] [2021-11-20 07:30:31,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777590857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:31,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573911066] [2021-11-20 07:30:31,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:30:31,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:31,361 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:31,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:30:31,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:30:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 07:30:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:31,458 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:30:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:30:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:30:31,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:30:32,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573911066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:32,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:32,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-11-20 07:30:32,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250657513] [2021-11-20 07:30:32,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 07:30:32,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 07:30:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:30:32,118 INFO L87 Difference]: Start difference. First operand 657 states and 742 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:32,785 INFO L93 Difference]: Finished difference Result 811 states and 904 transitions. [2021-11-20 07:30:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:30:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-20 07:30:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:32,793 INFO L225 Difference]: With dead ends: 811 [2021-11-20 07:30:32,793 INFO L226 Difference]: Without dead ends: 740 [2021-11-20 07:30:32,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:30:32,795 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 190 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:32,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 400 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:30:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-20 07:30:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 651. [2021-11-20 07:30:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 649 states have (on average 1.1325115562403698) internal successors, (735), 650 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 735 transitions. [2021-11-20 07:30:32,815 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 735 transitions. Word has length 60 [2021-11-20 07:30:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:32,815 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 735 transitions. [2021-11-20 07:30:32,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 735 transitions. [2021-11-20 07:30:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:30:32,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:32,817 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:32,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:33,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:33,037 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2021-11-20 07:30:33,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:33,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56069167] [2021-11-20 07:30:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:33,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:33,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56069167] [2021-11-20 07:30:33,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56069167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878604243] [2021-11-20 07:30:33,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:30:33,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:33,345 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:33,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:30:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 07:30:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:33,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:30:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878604243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:34,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2021-11-20 07:30:34,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893818161] [2021-11-20 07:30:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:34,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:30:34,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:30:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:30:34,242 INFO L87 Difference]: Start difference. First operand 651 states and 735 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:35,411 INFO L93 Difference]: Finished difference Result 920 states and 1020 transitions. [2021-11-20 07:30:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:30:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-20 07:30:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:35,416 INFO L225 Difference]: With dead ends: 920 [2021-11-20 07:30:35,416 INFO L226 Difference]: Without dead ends: 920 [2021-11-20 07:30:35,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2021-11-20 07:30:35,418 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 345 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:35,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 798 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:30:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-20 07:30:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 695. [2021-11-20 07:30:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 693 states have (on average 1.1370851370851371) internal successors, (788), 694 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 788 transitions. [2021-11-20 07:30:35,438 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 788 transitions. Word has length 61 [2021-11-20 07:30:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:35,438 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 788 transitions. [2021-11-20 07:30:35,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 788 transitions. [2021-11-20 07:30:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:30:35,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:35,440 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:35,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:35,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 07:30:35,657 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1827605318, now seen corresponding path program 5 times [2021-11-20 07:30:35,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320130635] [2021-11-20 07:30:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:35,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:35,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:35,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320130635] [2021-11-20 07:30:35,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320130635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823158975] [2021-11-20 07:30:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:30:35,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:35,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:35,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:30:36,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:30:36,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 07:30:36,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:36,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:30:36,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:30:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:36,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:30:37,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823158975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:37,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:37,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 35 [2021-11-20 07:30:37,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932814415] [2021-11-20 07:30:37,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:30:37,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:30:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:30:37,116 INFO L87 Difference]: Start difference. First operand 695 states and 788 transitions. Second operand has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:38,048 INFO L93 Difference]: Finished difference Result 887 states and 987 transitions. [2021-11-20 07:30:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:30:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-20 07:30:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:38,052 INFO L225 Difference]: With dead ends: 887 [2021-11-20 07:30:38,052 INFO L226 Difference]: Without dead ends: 769 [2021-11-20 07:30:38,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2021-11-20 07:30:38,053 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 294 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:38,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 631 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:30:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-20 07:30:38,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 595. [2021-11-20 07:30:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 593 states have (on average 1.1349072512647556) internal successors, (673), 594 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 673 transitions. [2021-11-20 07:30:38,071 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 673 transitions. Word has length 64 [2021-11-20 07:30:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:38,072 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 673 transitions. [2021-11-20 07:30:38,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.4) internal successors, (154), 36 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 673 transitions. [2021-11-20 07:30:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:30:38,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:38,074 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-20 07:30:38,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:38,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 07:30:38,289 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:30:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1970176257, now seen corresponding path program 5 times [2021-11-20 07:30:38,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:38,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607392913] [2021-11-20 07:30:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:38,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:30:39,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:30:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607392913] [2021-11-20 07:30:39,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607392913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:30:39,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698918043] [2021-11-20 07:30:39,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:30:39,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:39,280 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:39,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:30:39,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-20 07:30:39,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-20 07:30:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:30:39,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:30:40,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-20 07:30:41,978 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-20 07:30:41,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 34 [2021-11-20 07:30:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:30:42,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:43,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~length2~0#1| Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (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| 3)) .cse0)))))) is different from false [2021-11-20 07:30:43,592 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 07:30:43,592 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 [2021-11-20 07:30:43,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:30:43,604 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 [2021-11-20 07:30:43,686 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 07:30:43,686 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 [2021-11-20 07:30:43,756 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-20 07:30:43,756 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 [2021-11-20 07:30:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:30:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698918043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:44,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:30:44,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25, 25] total 69 [2021-11-20 07:30:44,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992999545] [2021-11-20 07:30:44,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:44,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 07:30:44,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:30:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 07:30:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4342, Unknown=1, NotChecked=132, Total=4692 [2021-11-20 07:30:44,243 INFO L87 Difference]: Start difference. First operand 595 states and 673 transitions. Second operand has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:30:51,257 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 65 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:31:02,055 WARN L227 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 56 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:31:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:03,085 INFO L93 Difference]: Finished difference Result 1053 states and 1175 transitions. [2021-11-20 07:31:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 07:31:03,086 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 07:31:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:03,090 INFO L225 Difference]: With dead ends: 1053 [2021-11-20 07:31:03,091 INFO L226 Difference]: Without dead ends: 1018 [2021-11-20 07:31:03,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=505, Invalid=9200, Unknown=1, NotChecked=194, Total=9900 [2021-11-20 07:31:03,092 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 297 mSDsluCounter, 2874 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 771 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:03,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 2962 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1829 Invalid, 0 Unknown, 771 Unchecked, 1.0s Time] [2021-11-20 07:31:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-20 07:31:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 888. [2021-11-20 07:31:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 886 states have (on average 1.136568848758465) internal successors, (1007), 887 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1007 transitions. [2021-11-20 07:31:03,119 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1007 transitions. Word has length 65 [2021-11-20 07:31:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:03,120 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1007 transitions. [2021-11-20 07:31:03,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.289855072463768) internal successors, (158), 69 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1007 transitions. [2021-11-20 07:31:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:31:03,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:03,123 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:03,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:03,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:03,341 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:03,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:03,342 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2021-11-20 07:31:03,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:03,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316443380] [2021-11-20 07:31:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:03,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:03,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316443380] [2021-11-20 07:31:03,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316443380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:03,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758339333] [2021-11-20 07:31:03,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:31:03,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:03,778 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:03,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:31:03,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:31:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 07:31:03,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:31:04,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:31:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:04,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:31:04,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:31:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758339333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:04,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:04,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2021-11-20 07:31:04,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321132825] [2021-11-20 07:31:04,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:04,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:31:04,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:31:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:31:04,842 INFO L87 Difference]: Start difference. First operand 888 states and 1007 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:06,173 INFO L93 Difference]: Finished difference Result 1509 states and 1677 transitions. [2021-11-20 07:31:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:31:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-20 07:31:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:06,178 INFO L225 Difference]: With dead ends: 1509 [2021-11-20 07:31:06,178 INFO L226 Difference]: Without dead ends: 1344 [2021-11-20 07:31:06,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=391, Invalid=3031, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:31:06,180 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 364 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:06,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1907 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1588 Invalid, 0 Unknown, 56 Unchecked, 0.7s Time] [2021-11-20 07:31:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-11-20 07:31:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1120. [2021-11-20 07:31:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1118 states have (on average 1.1359570661896243) internal successors, (1270), 1119 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1270 transitions. [2021-11-20 07:31:06,210 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1270 transitions. Word has length 66 [2021-11-20 07:31:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:06,210 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1270 transitions. [2021-11-20 07:31:06,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1270 transitions. [2021-11-20 07:31:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 07:31:06,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:06,214 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-20 07:31:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:06,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 07:31:06,429 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1600167810, now seen corresponding path program 6 times [2021-11-20 07:31:06,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:06,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993148586] [2021-11-20 07:31:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:06,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:31:06,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993148586] [2021-11-20 07:31:06,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993148586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203648745] [2021-11-20 07:31:06,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:31:06,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:06,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:06,709 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:06,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:31:06,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 07:31:06,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 07:31:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:31:07,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:07,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:31:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:31:08,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203648745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:08,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:08,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-11-20 07:31:08,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65692831] [2021-11-20 07:31:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:08,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:31:08,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:31:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:31:08,062 INFO L87 Difference]: Start difference. First operand 1120 states and 1270 transitions. Second operand has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:08,923 INFO L93 Difference]: Finished difference Result 1447 states and 1633 transitions. [2021-11-20 07:31:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:31:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-20 07:31:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:08,929 INFO L225 Difference]: With dead ends: 1447 [2021-11-20 07:31:08,929 INFO L226 Difference]: Without dead ends: 1447 [2021-11-20 07:31:08,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=2027, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:31:08,930 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 482 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:08,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 945 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:31:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-11-20 07:31:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1224. [2021-11-20 07:31:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1222 states have (on average 1.1374795417348609) internal successors, (1390), 1223 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1390 transitions. [2021-11-20 07:31:08,962 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1390 transitions. Word has length 69 [2021-11-20 07:31:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:08,962 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1390 transitions. [2021-11-20 07:31:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.696969696969697) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1390 transitions. [2021-11-20 07:31:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:31:08,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:08,966 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:09,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-20 07:31:09,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 07:31:09,190 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 267889840, now seen corresponding path program 9 times [2021-11-20 07:31:09,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:09,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280631314] [2021-11-20 07:31:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:09,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:09,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280631314] [2021-11-20 07:31:09,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280631314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482207609] [2021-11-20 07:31:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:31:09,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:09,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:09,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:31:09,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 07:31:09,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:09,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:31:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:09,781 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:09,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:31:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:11,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482207609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:11,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:11,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2021-11-20 07:31:11,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142249625] [2021-11-20 07:31:11,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:11,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 07:31:11,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 07:31:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2800, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:31:11,867 INFO L87 Difference]: Start difference. First operand 1224 states and 1390 transitions. Second operand has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:13,660 INFO L93 Difference]: Finished difference Result 1624 states and 1810 transitions. [2021-11-20 07:31:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 07:31:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:31:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:13,669 INFO L225 Difference]: With dead ends: 1624 [2021-11-20 07:31:13,669 INFO L226 Difference]: Without dead ends: 1624 [2021-11-20 07:31:13,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1376, Invalid=5430, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 07:31:13,670 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 671 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:13,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 808 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:31:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-11-20 07:31:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1279. [2021-11-20 07:31:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1277 states have (on average 1.139389193422083) internal successors, (1455), 1278 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1455 transitions. [2021-11-20 07:31:13,701 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1455 transitions. Word has length 70 [2021-11-20 07:31:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:13,702 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1455 transitions. [2021-11-20 07:31:13,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.607142857142857) internal successors, (202), 57 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1455 transitions. [2021-11-20 07:31:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:31:13,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:13,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:13,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:13,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 07:31:13,919 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1559326514, now seen corresponding path program 1 times [2021-11-20 07:31:13,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103959051] [2021-11-20 07:31:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:13,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:31:14,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:14,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103959051] [2021-11-20 07:31:14,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103959051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:14,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023539565] [2021-11-20 07:31:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:14,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:14,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:14,876 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:14,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:31:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 07:31:14,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:14,999 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 10 treesize of output 8 [2021-11-20 07:31:15,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:31:15,474 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:31:15,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:31:16,387 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:31:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:31:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:31:16,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:20,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:31:20,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:31:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:31:20,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023539565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:20,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:20,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 17] total 46 [2021-11-20 07:31:20,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375581731] [2021-11-20 07:31:20,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:20,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:31:20,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:20,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:31:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:31:20,955 INFO L87 Difference]: Start difference. First operand 1279 states and 1455 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:22,741 INFO L93 Difference]: Finished difference Result 1363 states and 1533 transitions. [2021-11-20 07:31:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:31:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:31:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:22,748 INFO L225 Difference]: With dead ends: 1363 [2021-11-20 07:31:22,748 INFO L226 Difference]: Without dead ends: 1072 [2021-11-20 07:31:22,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=374, Invalid=3916, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:31:22,749 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 197 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:22,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1234 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 959 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2021-11-20 07:31:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-20 07:31:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 945. [2021-11-20 07:31:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 943 states have (on average 1.1389183457051961) internal successors, (1074), 944 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1074 transitions. [2021-11-20 07:31:22,774 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1074 transitions. Word has length 70 [2021-11-20 07:31:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:22,775 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1074 transitions. [2021-11-20 07:31:22,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 46 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1074 transitions. [2021-11-20 07:31:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:31:22,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:22,778 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:22,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:22,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 07:31:22,993 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:22,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 7 times [2021-11-20 07:31:22,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:22,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850010955] [2021-11-20 07:31:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:22,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:23,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850010955] [2021-11-20 07:31:23,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850010955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133133010] [2021-11-20 07:31:23,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:31:23,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:23,629 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:23,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:31:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-20 07:31:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:23,733 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:23,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:31:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:31:24,672 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 07:31:24,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 07:31:26,092 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:31:26,093 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 27 treesize of output 23 [2021-11-20 07:31:27,632 INFO L354 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2021-11-20 07:31:27,632 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 61 treesize of output 39 [2021-11-20 07:31:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:27,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:28,937 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 07:31:28,937 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 214 treesize of output 174 [2021-11-20 07:31:28,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:28,945 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 170 treesize of output 164 [2021-11-20 07:31:28,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:31:28,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 17 [2021-11-20 07:31:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:31:29,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:31:29,087 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 68 treesize of output 72 [2021-11-20 07:31:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:31,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133133010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:31,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:31,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34, 33] total 83 [2021-11-20 07:31:31,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776083080] [2021-11-20 07:31:31,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:31,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-20 07:31:31,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:31,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-20 07:31:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=6424, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 07:31:31,957 INFO L87 Difference]: Start difference. First operand 945 states and 1074 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:36,528 INFO L93 Difference]: Finished difference Result 1764 states and 1987 transitions. [2021-11-20 07:31:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-20 07:31:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-20 07:31:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:36,536 INFO L225 Difference]: With dead ends: 1764 [2021-11-20 07:31:36,536 INFO L226 Difference]: Without dead ends: 1721 [2021-11-20 07:31:36,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=859, Invalid=15143, Unknown=0, NotChecked=0, Total=16002 [2021-11-20 07:31:36,538 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 389 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 4058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1430 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:36,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 2665 Invalid, 4058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2605 Invalid, 0 Unknown, 1430 Unchecked, 1.4s Time] [2021-11-20 07:31:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-11-20 07:31:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1461. [2021-11-20 07:31:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1459 states have (on average 1.1405071967100755) internal successors, (1664), 1460 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1664 transitions. [2021-11-20 07:31:36,572 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1664 transitions. Word has length 73 [2021-11-20 07:31:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:36,572 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 1664 transitions. [2021-11-20 07:31:36,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1664 transitions. [2021-11-20 07:31:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:31:36,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:36,576 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:36,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:36,795 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 10 times [2021-11-20 07:31:36,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090732530] [2021-11-20 07:31:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:36,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:37,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090732530] [2021-11-20 07:31:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090732530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005792164] [2021-11-20 07:31:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:31:37,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:37,305 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:37,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:31:37,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:31:37,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 07:31:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:37,411 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:37,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:31:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 07:31:38,771 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 07:31:38,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 07:31:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 96 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:38,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:39,865 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 [2021-11-20 07:31:39,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 07:31:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 95 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:40,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005792164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:40,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:40,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 65 [2021-11-20 07:31:40,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024265372] [2021-11-20 07:31:40,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-20 07:31:40,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-20 07:31:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3825, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 07:31:40,916 INFO L87 Difference]: Start difference. First operand 1461 states and 1664 transitions. Second operand has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:49,571 INFO L93 Difference]: Finished difference Result 2797 states and 3105 transitions. [2021-11-20 07:31:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-20 07:31:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-20 07:31:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:49,582 INFO L225 Difference]: With dead ends: 2797 [2021-11-20 07:31:49,582 INFO L226 Difference]: Without dead ends: 2427 [2021-11-20 07:31:49,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 144 SyntacticMatches, 14 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8975 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3457, Invalid=28049, Unknown=0, NotChecked=0, Total=31506 [2021-11-20 07:31:49,585 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 1879 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 3849 SdHoareTripleChecker+Invalid, 4969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 877 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:49,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1879 Valid, 3849 Invalid, 4969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3835 Invalid, 0 Unknown, 877 Unchecked, 2.1s Time] [2021-11-20 07:31:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-11-20 07:31:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1992. [2021-11-20 07:31:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1990 states have (on average 1.1381909547738693) internal successors, (2265), 1991 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2265 transitions. [2021-11-20 07:31:49,656 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2265 transitions. Word has length 75 [2021-11-20 07:31:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:49,656 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 2265 transitions. [2021-11-20 07:31:49,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.1846153846153844) internal successors, (207), 65 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2265 transitions. [2021-11-20 07:31:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:31:49,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:49,660 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:49,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:49,875 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 8 times [2021-11-20 07:31:49,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:49,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222786297] [2021-11-20 07:31:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:49,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:50,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222786297] [2021-11-20 07:31:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222786297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156299990] [2021-11-20 07:31:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:31:50,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:50,185 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:50,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:31:50,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:31:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-20 07:31:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:50,314 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:31:50,314 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 [2021-11-20 07:31:50,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:31:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:31:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156299990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:52,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-11-20 07:31:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118390547] [2021-11-20 07:31:52,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 07:31:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 07:31:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:31:52,313 INFO L87 Difference]: Start difference. First operand 1992 states and 2265 transitions. Second operand has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:53,995 INFO L93 Difference]: Finished difference Result 2541 states and 2879 transitions. [2021-11-20 07:31:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:31:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 07:31:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:54,005 INFO L225 Difference]: With dead ends: 2541 [2021-11-20 07:31:54,005 INFO L226 Difference]: Without dead ends: 2541 [2021-11-20 07:31:54,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=915, Invalid=4341, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:31:54,006 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 645 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:54,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 1232 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:31:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-20 07:31:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2142. [2021-11-20 07:31:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2140 states have (on average 1.138785046728972) internal successors, (2437), 2141 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2437 transitions. [2021-11-20 07:31:54,046 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2437 transitions. Word has length 77 [2021-11-20 07:31:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:54,046 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 2437 transitions. [2021-11-20 07:31:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.068181818181818) internal successors, (223), 45 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2437 transitions. [2021-11-20 07:31:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 07:31:54,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:54,051 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:54,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:54,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-20 07:31:54,277 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1372924284, now seen corresponding path program 11 times [2021-11-20 07:31:54,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:54,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513081847] [2021-11-20 07:31:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:54,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:54,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:54,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513081847] [2021-11-20 07:31:54,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513081847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:54,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863577882] [2021-11-20 07:31:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:31:54,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:54,813 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:54,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:31:54,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 07:31:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 07:31:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:54,952 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:31:54,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:31:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:55,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:56,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863577882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:56,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:31:56,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2021-11-20 07:31:56,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005148891] [2021-11-20 07:31:56,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:56,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 07:31:56,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:31:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 07:31:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:31:56,721 INFO L87 Difference]: Start difference. First operand 2142 states and 2437 transitions. Second operand has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:58,474 INFO L93 Difference]: Finished difference Result 3024 states and 3402 transitions. [2021-11-20 07:31:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:31:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 07:31:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:58,484 INFO L225 Difference]: With dead ends: 3024 [2021-11-20 07:31:58,485 INFO L226 Difference]: Without dead ends: 3024 [2021-11-20 07:31:58,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1262, Invalid=5218, Unknown=0, NotChecked=0, Total=6480 [2021-11-20 07:31:58,485 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 513 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:58,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 1230 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:31:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-11-20 07:31:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2505. [2021-11-20 07:31:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2503 states have (on average 1.1466240511386336) internal successors, (2870), 2504 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 2870 transitions. [2021-11-20 07:31:58,512 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 2870 transitions. Word has length 79 [2021-11-20 07:31:58,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:58,513 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 2870 transitions. [2021-11-20 07:31:58,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.06) internal successors, (203), 51 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:31:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 2870 transitions. [2021-11-20 07:31:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 07:31:58,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:58,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:58,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-20 07:31:58,745 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:31:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 2 times [2021-11-20 07:31:58,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:31:58,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441661042] [2021-11-20 07:31:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:31:58,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:31:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:31:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:31:59,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:31:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441661042] [2021-11-20 07:31:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441661042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:31:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263990697] [2021-11-20 07:31:59,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:31:59,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:31:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:31:59,200 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:31:59,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:31:59,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:31:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 07:31:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:59,304 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 10 treesize of output 8 [2021-11-20 07:31:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:31:59,698 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:31:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:32:00,820 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:32:00,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:32:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:32:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:05,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:32:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:32:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:32:06,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263990697] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:06,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:06,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 45 [2021-11-20 07:32:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059901024] [2021-11-20 07:32:06,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:06,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 07:32:06,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 07:32:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:32:06,291 INFO L87 Difference]: Start difference. First operand 2505 states and 2870 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:07,201 INFO L93 Difference]: Finished difference Result 2656 states and 3014 transitions. [2021-11-20 07:32:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:32:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-20 07:32:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:07,210 INFO L225 Difference]: With dead ends: 2656 [2021-11-20 07:32:07,211 INFO L226 Difference]: Without dead ends: 2159 [2021-11-20 07:32:07,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=226, Invalid=2966, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:32:07,211 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 137 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:07,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1825 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 798 Invalid, 0 Unknown, 190 Unchecked, 0.4s Time] [2021-11-20 07:32:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2021-11-20 07:32:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 1887. [2021-11-20 07:32:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1885 states have (on average 1.1442970822281167) internal successors, (2157), 1886 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 2157 transitions. [2021-11-20 07:32:07,242 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 2157 transitions. Word has length 82 [2021-11-20 07:32:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:07,243 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 2157 transitions. [2021-11-20 07:32:07,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 2157 transitions. [2021-11-20 07:32:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 07:32:07,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:07,247 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:07,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:07,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:07,465 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1425198035, now seen corresponding path program 12 times [2021-11-20 07:32:07,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:07,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180601626] [2021-11-20 07:32:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:07,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:07,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180601626] [2021-11-20 07:32:07,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180601626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:07,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763704065] [2021-11-20 07:32:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:32:07,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:07,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:07,904 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:07,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:32:08,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 07:32:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 07:32:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:08,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:32:08,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:32:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:08,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:32:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:32:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 23 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:09,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763704065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:09,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:09,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 45 [2021-11-20 07:32:09,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734130033] [2021-11-20 07:32:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:09,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-20 07:32:09,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-20 07:32:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:32:09,077 INFO L87 Difference]: Start difference. First operand 1887 states and 2157 transitions. Second operand has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:11,184 INFO L93 Difference]: Finished difference Result 2750 states and 3091 transitions. [2021-11-20 07:32:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:32:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-20 07:32:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:11,198 INFO L225 Difference]: With dead ends: 2750 [2021-11-20 07:32:11,199 INFO L226 Difference]: Without dead ends: 2417 [2021-11-20 07:32:11,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 07:32:11,200 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 537 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 3170 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:11,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 3170 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2682 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 07:32:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-11-20 07:32:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2144. [2021-11-20 07:32:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2142 states have (on average 1.1447245564892623) internal successors, (2452), 2143 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 2452 transitions. [2021-11-20 07:32:11,235 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 2452 transitions. Word has length 84 [2021-11-20 07:32:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:11,236 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 2452 transitions. [2021-11-20 07:32:11,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.0) internal successors, (135), 45 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 2452 transitions. [2021-11-20 07:32:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 07:32:11,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:11,241 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:11,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:11,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 07:32:11,469 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 9 times [2021-11-20 07:32:11,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711068679] [2021-11-20 07:32:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:11,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:32:12,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711068679] [2021-11-20 07:32:12,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711068679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619399289] [2021-11-20 07:32:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:32:12,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:12,306 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:12,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:32:12,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 07:32:12,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:12,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 07:32:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:12,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:32:12,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:32:13,002 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:32:13,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:32:14,417 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:32:14,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:32:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:32:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:23,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:32:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:32:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:32:23,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619399289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:23,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22, 21] total 63 [2021-11-20 07:32:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933162887] [2021-11-20 07:32:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:23,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 07:32:23,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 07:32:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3727, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:32:23,847 INFO L87 Difference]: Start difference. First operand 2144 states and 2452 transitions. Second operand has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:26,560 INFO L93 Difference]: Finished difference Result 4300 states and 4889 transitions. [2021-11-20 07:32:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:32:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-20 07:32:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:26,570 INFO L225 Difference]: With dead ends: 4300 [2021-11-20 07:32:26,571 INFO L226 Difference]: Without dead ends: 2964 [2021-11-20 07:32:26,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=381, Invalid=8549, Unknown=0, NotChecked=0, Total=8930 [2021-11-20 07:32:26,572 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 178 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:26,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2602 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1519 Invalid, 0 Unknown, 318 Unchecked, 0.8s Time] [2021-11-20 07:32:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-11-20 07:32:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2334. [2021-11-20 07:32:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2332 states have (on average 1.1436535162950257) internal successors, (2667), 2333 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 2667 transitions. [2021-11-20 07:32:26,608 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 2667 transitions. Word has length 85 [2021-11-20 07:32:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 2667 transitions. [2021-11-20 07:32:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.6507936507936507) internal successors, (230), 63 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 2667 transitions. [2021-11-20 07:32:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 07:32:26,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:26,612 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:26,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:26,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 07:32:26,844 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash 767994506, now seen corresponding path program 13 times [2021-11-20 07:32:26,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:26,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030597035] [2021-11-20 07:32:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:26,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:27,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030597035] [2021-11-20 07:32:27,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030597035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:27,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453064499] [2021-11-20 07:32:27,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:32:27,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:27,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:27,473 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:27,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:32:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 07:32:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:28,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:32:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:28,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453064499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:28,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:28,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2021-11-20 07:32:28,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085132764] [2021-11-20 07:32:28,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:28,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 07:32:28,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 07:32:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:32:28,972 INFO L87 Difference]: Start difference. First operand 2334 states and 2667 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:30,844 INFO L93 Difference]: Finished difference Result 2829 states and 3178 transitions. [2021-11-20 07:32:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:32:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-20 07:32:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:30,851 INFO L225 Difference]: With dead ends: 2829 [2021-11-20 07:32:30,852 INFO L226 Difference]: Without dead ends: 2829 [2021-11-20 07:32:30,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1161, Invalid=5001, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 07:32:30,853 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 711 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:30,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1218 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:32:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2021-11-20 07:32:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2394. [2021-11-20 07:32:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2392 states have (on average 1.144648829431438) internal successors, (2738), 2393 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 2738 transitions. [2021-11-20 07:32:30,902 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 2738 transitions. Word has length 88 [2021-11-20 07:32:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:30,902 INFO L470 AbstractCegarLoop]: Abstraction has 2394 states and 2738 transitions. [2021-11-20 07:32:30,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 2738 transitions. [2021-11-20 07:32:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 07:32:30,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:30,906 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:30,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:31,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-20 07:32:31,133 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 10 times [2021-11-20 07:32:31,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:31,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974328602] [2021-11-20 07:32:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:31,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:32:31,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974328602] [2021-11-20 07:32:31,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974328602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13186867] [2021-11-20 07:32:31,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:32:31,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:31,577 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:31,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:32:31,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:32:31,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 07:32:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:31,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:32:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:32:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:32:32,733 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:32:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 07:32:34,196 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 07:32:34,196 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 25 [2021-11-20 07:32:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 50 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:34,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:38,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-20 07:32:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 66 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:40,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13186867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:40,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:40,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 68 [2021-11-20 07:32:40,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464875956] [2021-11-20 07:32:40,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:40,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 07:32:40,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 07:32:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4256, Unknown=1, NotChecked=0, Total=4692 [2021-11-20 07:32:40,345 INFO L87 Difference]: Start difference. First operand 2394 states and 2738 transitions. Second operand has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:45,621 INFO L93 Difference]: Finished difference Result 2699 states and 3076 transitions. [2021-11-20 07:32:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 07:32:45,622 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-20 07:32:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:45,627 INFO L225 Difference]: With dead ends: 2699 [2021-11-20 07:32:45,627 INFO L226 Difference]: Without dead ends: 2699 [2021-11-20 07:32:45,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2934 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1512, Invalid=12529, Unknown=1, NotChecked=0, Total=14042 [2021-11-20 07:32:45,630 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 490 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:45,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 1899 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1392 Invalid, 0 Unknown, 403 Unchecked, 0.9s Time] [2021-11-20 07:32:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-11-20 07:32:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2640. [2021-11-20 07:32:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2638 states have (on average 1.1455648218347232) internal successors, (3022), 2639 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3022 transitions. [2021-11-20 07:32:45,669 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3022 transitions. Word has length 89 [2021-11-20 07:32:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:45,669 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3022 transitions. [2021-11-20 07:32:45,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.8088235294117645) internal successors, (259), 69 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3022 transitions. [2021-11-20 07:32:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 07:32:45,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:45,673 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:45,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:45,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:45,887 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2114784281, now seen corresponding path program 14 times [2021-11-20 07:32:45,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:45,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375892796] [2021-11-20 07:32:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:45,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 26 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:46,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375892796] [2021-11-20 07:32:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375892796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:46,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304649358] [2021-11-20 07:32:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:32:46,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:46,519 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:46,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:32:46,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:32:46,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 07:32:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:32:48,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:32:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:32:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 91 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:49,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:51,038 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 [2021-11-20 07:32:51,040 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 46 treesize of output 42 [2021-11-20 07:32:51,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-11-20 07:32:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 91 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:32:51,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304649358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:51,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:32:51,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 72 [2021-11-20 07:32:51,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964287444] [2021-11-20 07:32:51,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:51,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 07:32:51,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:32:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 07:32:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=4785, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:32:51,159 INFO L87 Difference]: Start difference. First operand 2640 states and 3022 transitions. Second operand has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:56,069 INFO L93 Difference]: Finished difference Result 3718 states and 4193 transitions. [2021-11-20 07:32:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-20 07:32:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-20 07:32:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:56,074 INFO L225 Difference]: With dead ends: 3718 [2021-11-20 07:32:56,074 INFO L226 Difference]: Without dead ends: 3644 [2021-11-20 07:32:56,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3108 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=865, Invalid=12245, Unknown=0, NotChecked=0, Total=13110 [2021-11-20 07:32:56,075 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 627 mSDsluCounter, 4060 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1470 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:56,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 4212 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2545 Invalid, 0 Unknown, 1470 Unchecked, 1.3s Time] [2021-11-20 07:32:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-11-20 07:32:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2994. [2021-11-20 07:32:56,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2992 states have (on average 1.1463903743315509) internal successors, (3430), 2993 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3430 transitions. [2021-11-20 07:32:56,125 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3430 transitions. Word has length 93 [2021-11-20 07:32:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:56,125 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 3430 transitions. [2021-11-20 07:32:56,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.25) internal successors, (234), 72 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:32:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3430 transitions. [2021-11-20 07:32:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:32:56,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:56,130 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-11-20 07:32:56,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:56,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:56,343 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:32:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1245128407, now seen corresponding path program 11 times [2021-11-20 07:32:56,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:32:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547472772] [2021-11-20 07:32:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:32:56,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:32:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:32:56,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:32:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547472772] [2021-11-20 07:32:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547472772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:32:56,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593880645] [2021-11-20 07:32:56,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:32:56,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:32:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:32:57,000 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:32:57,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:32:57,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 07:32:57,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-20 07:32:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:32:58,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:32:58,090 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 [2021-11-20 07:33:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:33:02,005 INFO L354 Elim1Store]: treesize reduction 59, result has 18.1 percent of original size [2021-11-20 07:33:02,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 45 [2021-11-20 07:33:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 45 proven. 195 refuted. 8 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:33:02,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:05,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:33:05,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-11-20 07:33:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-20 07:33:05,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:33:05,207 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 54 treesize of output 54 [2021-11-20 07:33:05,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:33:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 45 proven. 203 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:33:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593880645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:07,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:33:07,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 29] total 88 [2021-11-20 07:33:07,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783240610] [2021-11-20 07:33:07,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:07,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-20 07:33:07,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:33:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-20 07:33:07,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=7195, Unknown=1, NotChecked=0, Total=7656 [2021-11-20 07:33:07,229 INFO L87 Difference]: Start difference. First operand 2994 states and 3430 transitions. Second operand has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:33:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:59,971 INFO L93 Difference]: Finished difference Result 7440 states and 8484 transitions. [2021-11-20 07:33:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-11-20 07:33:59,972 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-20 07:33:59,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:59,984 INFO L225 Difference]: With dead ends: 7440 [2021-11-20 07:33:59,984 INFO L226 Difference]: Without dead ends: 7381 [2021-11-20 07:33:59,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22501 ImplicationChecksByTransitivity, 55.9s TimeCoverageRelationStatistics Valid=5062, Invalid=69193, Unknown=1, NotChecked=0, Total=74256 [2021-11-20 07:33:59,990 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1004 mSDsluCounter, 6287 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 6524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1199 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:59,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 6454 Invalid, 6524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 5226 Invalid, 0 Unknown, 1199 Unchecked, 3.1s Time] [2021-11-20 07:33:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-11-20 07:34:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 4389. [2021-11-20 07:34:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4387 states have (on average 1.1483929792568954) internal successors, (5038), 4388 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 5038 transitions. [2021-11-20 07:34:00,071 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 5038 transitions. Word has length 101 [2021-11-20 07:34:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:00,071 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 5038 transitions. [2021-11-20 07:34:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.215909090909091) internal successors, (283), 88 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 5038 transitions. [2021-11-20 07:34:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 07:34:00,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:00,077 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:00,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:00,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:00,293 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1402500025, now seen corresponding path program 15 times [2021-11-20 07:34:00,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:00,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251701822] [2021-11-20 07:34:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:00,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251701822] [2021-11-20 07:34:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251701822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866934686] [2021-11-20 07:34:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:34:01,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:01,019 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:01,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:34:01,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 07:34:01,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-20 07:34:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:01,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:34:02,270 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 11 treesize of output 7 [2021-11-20 07:34:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 07:34:04,578 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 07:34:04,579 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 23 [2021-11-20 07:34:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:04,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:05,686 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 9)) 0)) is different from false [2021-11-20 07:34:05,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:05,694 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-20 07:34:05,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-20 07:34:05,714 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 9 treesize of output 4 [2021-11-20 07:34:05,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:05,730 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 39 treesize of output 43 [2021-11-20 07:34:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 29 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:06,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866934686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:06,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:06,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 30] total 77 [2021-11-20 07:34:06,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957727773] [2021-11-20 07:34:06,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:06,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 07:34:06,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 07:34:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5455, Unknown=1, NotChecked=148, Total=5852 [2021-11-20 07:34:06,733 INFO L87 Difference]: Start difference. First operand 4389 states and 5038 transitions. Second operand has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:11,137 INFO L93 Difference]: Finished difference Result 6985 states and 8000 transitions. [2021-11-20 07:34:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-20 07:34:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-20 07:34:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:11,151 INFO L225 Difference]: With dead ends: 6985 [2021-11-20 07:34:11,152 INFO L226 Difference]: Without dead ends: 6847 [2021-11-20 07:34:11,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3451 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=681, Invalid=13602, Unknown=1, NotChecked=236, Total=14520 [2021-11-20 07:34:11,154 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 508 mSDsluCounter, 5790 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 5949 SdHoareTripleChecker+Invalid, 4991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2040 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:11,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 5949 Invalid, 4991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2887 Invalid, 0 Unknown, 2040 Unchecked, 1.7s Time] [2021-11-20 07:34:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-11-20 07:34:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 4498. [2021-11-20 07:34:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4498 states, 4496 states have (on average 1.147909252669039) internal successors, (5161), 4497 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 5161 transitions. [2021-11-20 07:34:11,247 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 5161 transitions. Word has length 102 [2021-11-20 07:34:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:11,247 INFO L470 AbstractCegarLoop]: Abstraction has 4498 states and 5161 transitions. [2021-11-20 07:34:11,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.1818181818181817) internal successors, (245), 77 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 5161 transitions. [2021-11-20 07:34:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 07:34:11,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:11,254 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:11,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-20 07:34:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-20 07:34:11,470 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1330470007, now seen corresponding path program 6 times [2021-11-20 07:34:11,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:11,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489915344] [2021-11-20 07:34:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:11,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:12,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489915344] [2021-11-20 07:34:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489915344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:12,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253067276] [2021-11-20 07:34:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:34:12,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:12,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:12,161 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:12,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:34:12,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 07:34:12,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-20 07:34:12,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:12,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:34:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:34:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:13,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:13,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:34:13,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:34:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:13,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253067276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:13,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:13,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2021-11-20 07:34:13,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294806447] [2021-11-20 07:34:13,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:13,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:34:13,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:13,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:34:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 07:34:13,945 INFO L87 Difference]: Start difference. First operand 4498 states and 5161 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:16,601 INFO L93 Difference]: Finished difference Result 6145 states and 6974 transitions. [2021-11-20 07:34:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:34:16,602 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-20 07:34:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:16,612 INFO L225 Difference]: With dead ends: 6145 [2021-11-20 07:34:16,612 INFO L226 Difference]: Without dead ends: 5535 [2021-11-20 07:34:16,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=523, Invalid=4733, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:34:16,613 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 619 mSDsluCounter, 3300 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:16,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 3448 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2733 Invalid, 0 Unknown, 91 Unchecked, 1.5s Time] [2021-11-20 07:34:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-11-20 07:34:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5004. [2021-11-20 07:34:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 5002 states have (on average 1.1493402638944423) internal successors, (5749), 5003 states have internal predecessors, (5749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 5749 transitions. [2021-11-20 07:34:16,689 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 5749 transitions. Word has length 105 [2021-11-20 07:34:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:16,690 INFO L470 AbstractCegarLoop]: Abstraction has 5004 states and 5749 transitions. [2021-11-20 07:34:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 5749 transitions. [2021-11-20 07:34:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 07:34:16,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:16,696 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:16,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:16,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-20 07:34:16,925 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1831533212, now seen corresponding path program 16 times [2021-11-20 07:34:16,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:16,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224542354] [2021-11-20 07:34:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:16,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:17,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224542354] [2021-11-20 07:34:17,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224542354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:17,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350104128] [2021-11-20 07:34:17,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:34:17,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:17,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:17,741 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:34:17,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:34:17,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-20 07:34:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:17,903 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:34:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:34:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:34:19,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:34:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:34:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 162 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:20,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:22,150 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 [2021-11-20 07:34:22,152 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 [2021-11-20 07:34:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 190 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:24,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350104128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:24,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:24,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 78 [2021-11-20 07:34:24,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490294354] [2021-11-20 07:34:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:24,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-20 07:34:24,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-20 07:34:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=5563, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 07:34:24,774 INFO L87 Difference]: Start difference. First operand 5004 states and 5749 transitions. Second operand has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:35,913 INFO L93 Difference]: Finished difference Result 7326 states and 8305 transitions. [2021-11-20 07:34:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-20 07:34:35,914 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 07:34:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:35,920 INFO L225 Difference]: With dead ends: 7326 [2021-11-20 07:34:35,920 INFO L226 Difference]: Without dead ends: 7326 [2021-11-20 07:34:35,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5364 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5036, Invalid=24034, Unknown=0, NotChecked=0, Total=29070 [2021-11-20 07:34:35,922 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1808 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 4830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1808 Valid, 3364 Invalid, 4830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 3843 Invalid, 0 Unknown, 296 Unchecked, 3.0s Time] [2021-11-20 07:34:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-11-20 07:34:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5913. [2021-11-20 07:34:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5913 states, 5911 states have (on average 1.1563187277956353) internal successors, (6835), 5912 states have internal predecessors, (6835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5913 states to 5913 states and 6835 transitions. [2021-11-20 07:34:36,005 INFO L78 Accepts]: Start accepts. Automaton has 5913 states and 6835 transitions. Word has length 106 [2021-11-20 07:34:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:36,006 INFO L470 AbstractCegarLoop]: Abstraction has 5913 states and 6835 transitions. [2021-11-20 07:34:36,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.5384615384615383) internal successors, (276), 79 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5913 states and 6835 transitions. [2021-11-20 07:34:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 07:34:36,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:36,014 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:36,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:36,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:36,241 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1106575132, now seen corresponding path program 3 times [2021-11-20 07:34:36,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:36,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520831296] [2021-11-20 07:34:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:36,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:34:36,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520831296] [2021-11-20 07:34:36,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520831296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389949154] [2021-11-20 07:34:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:34:36,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:36,930 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:36,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:34:37,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 07:34:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-20 07:34:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:37,249 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 10 treesize of output 8 [2021-11-20 07:34:37,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:34:37,872 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:34:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:34:40,521 INFO L354 Elim1Store]: treesize reduction 55, result has 36.8 percent of original size [2021-11-20 07:34:40,522 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 45 treesize of output 54 [2021-11-20 07:34:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 267 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:34:40,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:42,249 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-11-20 07:34:42,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-11-20 07:34:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 267 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:34:42,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389949154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:42,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:42,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 26] total 62 [2021-11-20 07:34:42,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504611924] [2021-11-20 07:34:42,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:42,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-20 07:34:42,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:42,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-20 07:34:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3472, Unknown=1, NotChecked=118, Total=3782 [2021-11-20 07:34:42,938 INFO L87 Difference]: Start difference. First operand 5913 states and 6835 transitions. Second operand has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:47,362 INFO L93 Difference]: Finished difference Result 9204 states and 10592 transitions. [2021-11-20 07:34:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:34:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-20 07:34:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:47,369 INFO L225 Difference]: With dead ends: 9204 [2021-11-20 07:34:47,370 INFO L226 Difference]: Without dead ends: 7150 [2021-11-20 07:34:47,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=360, Invalid=6614, Unknown=2, NotChecked=164, Total=7140 [2021-11-20 07:34:47,371 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 323 mSDsluCounter, 5383 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 976 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:47,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 5566 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1511 Invalid, 0 Unknown, 976 Unchecked, 0.8s Time] [2021-11-20 07:34:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7150 states. [2021-11-20 07:34:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7150 to 4387. [2021-11-20 07:34:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4387 states, 4385 states have (on average 1.1543899657924743) internal successors, (5062), 4386 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4387 states to 4387 states and 5062 transitions. [2021-11-20 07:34:47,451 INFO L78 Accepts]: Start accepts. Automaton has 4387 states and 5062 transitions. Word has length 106 [2021-11-20 07:34:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:47,452 INFO L470 AbstractCegarLoop]: Abstraction has 4387 states and 5062 transitions. [2021-11-20 07:34:47,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.870967741935484) internal successors, (240), 62 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4387 states and 5062 transitions. [2021-11-20 07:34:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 07:34:47,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:47,456 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:47,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:47,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:47,657 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash 415957306, now seen corresponding path program 7 times [2021-11-20 07:34:47,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:47,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227691036] [2021-11-20 07:34:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:47,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 91 proven. 307 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:48,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227691036] [2021-11-20 07:34:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227691036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427672551] [2021-11-20 07:34:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:34:48,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:48,359 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:48,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 07:34:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 07:34:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:49,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:50,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:34:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:34:50,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427672551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:50,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:34:50,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 54 [2021-11-20 07:34:50,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851279845] [2021-11-20 07:34:50,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:34:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:34:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:34:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 07:34:50,153 INFO L87 Difference]: Start difference. First operand 4387 states and 5062 transitions. Second operand has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:52,444 INFO L93 Difference]: Finished difference Result 5686 states and 6433 transitions. [2021-11-20 07:34:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:34:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-20 07:34:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:52,449 INFO L225 Difference]: With dead ends: 5686 [2021-11-20 07:34:52,449 INFO L226 Difference]: Without dead ends: 5686 [2021-11-20 07:34:52,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1377, Invalid=5933, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 07:34:52,450 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 535 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:52,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 1690 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:34:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-11-20 07:34:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4442. [2021-11-20 07:34:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 4440 states have (on average 1.154954954954955) internal successors, (5128), 4441 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 5128 transitions. [2021-11-20 07:34:52,518 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 5128 transitions. Word has length 109 [2021-11-20 07:34:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:52,519 INFO L470 AbstractCegarLoop]: Abstraction has 4442 states and 5128 transitions. [2021-11-20 07:34:52,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:34:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 5128 transitions. [2021-11-20 07:34:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 07:34:52,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:52,525 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:52,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:52,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-20 07:34:52,745 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:34:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -196905228, now seen corresponding path program 12 times [2021-11-20 07:34:52,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:34:52,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879145793] [2021-11-20 07:34:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:34:52,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:34:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:34:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:34:53,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:34:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879145793] [2021-11-20 07:34:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879145793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:34:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722565844] [2021-11-20 07:34:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:34:53,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:34:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:34:53,775 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:34:53,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 07:34:53,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 07:34:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 159 conjunts are in the unsatisfiable core [2021-11-20 07:34:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:53,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:34:53,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-20 07:34:55,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:34:55,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:34:55,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 07:34:57,305 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:34:57,306 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 56 treesize of output 48 [2021-11-20 07:34:59,757 INFO L354 Elim1Store]: treesize reduction 112, result has 10.4 percent of original size [2021-11-20 07:34:59,758 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 63 treesize of output 50 [2021-11-20 07:34:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:34:59,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:02,394 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-20 07:35:02,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 182 [2021-11-20 07:35:02,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:02,407 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 182 treesize of output 176 [2021-11-20 07:35:02,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:02,701 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 30 [2021-11-20 07:35:03,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 147 treesize of output 236 [2021-11-20 07:35:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:09,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722565844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:09,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:09,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 40, 37] total 98 [2021-11-20 07:35:09,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635339842] [2021-11-20 07:35:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:09,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-20 07:35:09,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-20 07:35:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=9133, Unknown=0, NotChecked=0, Total=9506 [2021-11-20 07:35:09,492 INFO L87 Difference]: Start difference. First operand 4442 states and 5128 transitions. Second operand has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:30,653 INFO L93 Difference]: Finished difference Result 9117 states and 10544 transitions. [2021-11-20 07:35:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-20 07:35:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-20 07:35:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:30,660 INFO L225 Difference]: With dead ends: 9117 [2021-11-20 07:35:30,660 INFO L226 Difference]: Without dead ends: 9050 [2021-11-20 07:35:30,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 158 SyntacticMatches, 10 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9381 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2530, Invalid=36872, Unknown=0, NotChecked=0, Total=39402 [2021-11-20 07:35:30,662 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 1906 mSDsluCounter, 6171 mSDsCounter, 0 mSdLazyCounter, 7319 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 6304 SdHoareTripleChecker+Invalid, 10883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 7319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3238 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:30,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 6304 Invalid, 10883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 7319 Invalid, 0 Unknown, 3238 Unchecked, 4.3s Time] [2021-11-20 07:35:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-20 07:35:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 6925. [2021-11-20 07:35:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 6923 states have (on average 1.1588906543406037) internal successors, (8023), 6924 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 8023 transitions. [2021-11-20 07:35:30,747 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 8023 transitions. Word has length 109 [2021-11-20 07:35:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:30,748 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 8023 transitions. [2021-11-20 07:35:30,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.0510204081632653) internal successors, (299), 98 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 8023 transitions. [2021-11-20 07:35:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 07:35:30,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:30,753 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:30,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:30,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-20 07:35:30,957 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:35:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash -846590015, now seen corresponding path program 4 times [2021-11-20 07:35:30,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:30,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658754515] [2021-11-20 07:35:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:30,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 45 proven. 258 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:35:31,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658754515] [2021-11-20 07:35:31,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658754515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782205461] [2021-11-20 07:35:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:35:31,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:31,391 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:31,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 07:35:31,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:35:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:31,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 07:35:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:31,558 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:35:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:35:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:35:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:35:32,522 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:35:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 07:35:34,279 INFO L354 Elim1Store]: treesize reduction 45, result has 18.2 percent of original size [2021-11-20 07:35:34,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2021-11-20 07:35:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 73 proven. 231 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:35:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:38,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2021-11-20 07:35:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:35:39,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782205461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:39,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:39,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 68 [2021-11-20 07:35:39,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110015373] [2021-11-20 07:35:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:39,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-20 07:35:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-20 07:35:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=4230, Unknown=1, NotChecked=0, Total=4692 [2021-11-20 07:35:39,595 INFO L87 Difference]: Start difference. First operand 6925 states and 8023 transitions. Second operand has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:46,551 INFO L93 Difference]: Finished difference Result 9664 states and 11187 transitions. [2021-11-20 07:35:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-20 07:35:46,552 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-20 07:35:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:46,558 INFO L225 Difference]: With dead ends: 9664 [2021-11-20 07:35:46,559 INFO L226 Difference]: Without dead ends: 9664 [2021-11-20 07:35:46,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2494, Invalid=15061, Unknown=1, NotChecked=0, Total=17556 [2021-11-20 07:35:46,560 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 718 mSDsluCounter, 4211 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 4109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1633 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:46,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 4365 Invalid, 4109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2444 Invalid, 0 Unknown, 1633 Unchecked, 1.3s Time] [2021-11-20 07:35:46,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2021-11-20 07:35:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 7519. [2021-11-20 07:35:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7519 states, 7517 states have (on average 1.1593720899294933) internal successors, (8715), 7518 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7519 states to 7519 states and 8715 transitions. [2021-11-20 07:35:46,707 INFO L78 Accepts]: Start accepts. Automaton has 7519 states and 8715 transitions. Word has length 110 [2021-11-20 07:35:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:46,707 INFO L470 AbstractCegarLoop]: Abstraction has 7519 states and 8715 transitions. [2021-11-20 07:35:46,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.411764705882353) internal successors, (300), 69 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:35:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 7519 states and 8715 transitions. [2021-11-20 07:35:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-20 07:35:46,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:46,713 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:46,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:46,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:46,914 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:35:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash -964080841, now seen corresponding path program 8 times [2021-11-20 07:35:46,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:35:46,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931752850] [2021-11-20 07:35:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:46,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:35:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 32 proven. 418 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:35:47,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:35:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931752850] [2021-11-20 07:35:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931752850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:35:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022854472] [2021-11-20 07:35:47,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:35:47,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:35:47,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:47,549 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:35:47,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 07:35:47,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:35:47,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-20 07:35:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:35:50,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:35:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:35:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:35:50,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:52,829 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 [2021-11-20 07:35:52,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 07:35:52,834 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 38 treesize of output 30 [2021-11-20 07:35:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:35:52,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022854472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:52,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:35:52,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 77 [2021-11-20 07:35:52,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985360492] [2021-11-20 07:35:52,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:52,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-20 07:35:52,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:35:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-20 07:35:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=5483, Unknown=0, NotChecked=0, Total=5852 [2021-11-20 07:35:52,962 INFO L87 Difference]: Start difference. First operand 7519 states and 8715 transitions. Second operand has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:04,757 INFO L93 Difference]: Finished difference Result 8970 states and 10199 transitions. [2021-11-20 07:36:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-20 07:36:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-20 07:36:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:04,763 INFO L225 Difference]: With dead ends: 8970 [2021-11-20 07:36:04,763 INFO L226 Difference]: Without dead ends: 8200 [2021-11-20 07:36:04,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4865 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1321, Invalid=18139, Unknown=0, NotChecked=0, Total=19460 [2021-11-20 07:36:04,765 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 755 mSDsluCounter, 5403 mSDsCounter, 0 mSdLazyCounter, 2941 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 5591 SdHoareTripleChecker+Invalid, 4679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1707 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:04,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 5591 Invalid, 4679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2941 Invalid, 0 Unknown, 1707 Unchecked, 1.4s Time] [2021-11-20 07:36:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-11-20 07:36:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 6837. [2021-11-20 07:36:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6837 states, 6835 states have (on average 1.1531821506949524) internal successors, (7882), 6836 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6837 states to 6837 states and 7882 transitions. [2021-11-20 07:36:04,888 INFO L78 Accepts]: Start accepts. Automaton has 6837 states and 7882 transitions. Word has length 114 [2021-11-20 07:36:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:04,888 INFO L470 AbstractCegarLoop]: Abstraction has 6837 states and 7882 transitions. [2021-11-20 07:36:04,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.675324675324675) internal successors, (283), 77 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6837 states and 7882 transitions. [2021-11-20 07:36:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:36:04,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:04,893 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:04,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:05,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-20 07:36:05,109 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:36:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 920981252, now seen corresponding path program 17 times [2021-11-20 07:36:05,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:05,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923591986] [2021-11-20 07:36:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:05,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 322 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:05,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:05,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923591986] [2021-11-20 07:36:05,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923591986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:05,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243727138] [2021-11-20 07:36:05,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:36:05,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:05,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:05,642 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:05,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-20 07:36:05,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-20 07:36:05,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-20 07:36:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:05,818 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:36:05,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:36:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 333 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:06,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 332 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243727138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:07,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:07,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 72 [2021-11-20 07:36:07,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725356701] [2021-11-20 07:36:07,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-20 07:36:07,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-20 07:36:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-11-20 07:36:07,726 INFO L87 Difference]: Start difference. First operand 6837 states and 7882 transitions. Second operand has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:14,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:14,192 INFO L93 Difference]: Finished difference Result 12296 states and 13775 transitions. [2021-11-20 07:36:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-11-20 07:36:14,193 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-20 07:36:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:14,202 INFO L225 Difference]: With dead ends: 12296 [2021-11-20 07:36:14,202 INFO L226 Difference]: Without dead ends: 12217 [2021-11-20 07:36:14,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16561 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=11115, Invalid=41097, Unknown=0, NotChecked=0, Total=52212 [2021-11-20 07:36:14,206 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 1146 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:14,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1730 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 07:36:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12217 states. [2021-11-20 07:36:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12217 to 8873. [2021-11-20 07:36:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8873 states, 8871 states have (on average 1.164693946567467) internal successors, (10332), 8872 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8873 states to 8873 states and 10332 transitions. [2021-11-20 07:36:14,341 INFO L78 Accepts]: Start accepts. Automaton has 8873 states and 10332 transitions. Word has length 116 [2021-11-20 07:36:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:14,341 INFO L470 AbstractCegarLoop]: Abstraction has 8873 states and 10332 transitions. [2021-11-20 07:36:14,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.736111111111111) internal successors, (269), 72 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8873 states and 10332 transitions. [2021-11-20 07:36:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-20 07:36:14,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:14,347 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 11, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:14,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:14,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-20 07:36:14,548 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:36:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1763231455, now seen corresponding path program 9 times [2021-11-20 07:36:14,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:14,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180522251] [2021-11-20 07:36:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:14,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:36:14,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180522251] [2021-11-20 07:36:14,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180522251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:14,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128995447] [2021-11-20 07:36:14,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:36:14,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:14,956 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:14,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-20 07:36:15,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 07:36:15,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 07:36:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:15,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:36:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:36:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:36:15,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:36:16,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:36:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 38 proven. 369 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-20 07:36:16,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128995447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:16,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:16,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 42 [2021-11-20 07:36:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840997058] [2021-11-20 07:36:16,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:16,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:36:16,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:36:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:36:16,501 INFO L87 Difference]: Start difference. First operand 8873 states and 10332 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:18,163 INFO L93 Difference]: Finished difference Result 9321 states and 10645 transitions. [2021-11-20 07:36:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:36:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-20 07:36:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:18,170 INFO L225 Difference]: With dead ends: 9321 [2021-11-20 07:36:18,170 INFO L226 Difference]: Without dead ends: 8693 [2021-11-20 07:36:18,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 218 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=453, Invalid=3453, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:36:18,171 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 465 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2261 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:18,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 2261 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 07:36:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states. [2021-11-20 07:36:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8693 to 7494. [2021-11-20 07:36:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 7492 states have (on average 1.1569674319273893) internal successors, (8668), 7493 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 8668 transitions. [2021-11-20 07:36:18,242 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 8668 transitions. Word has length 119 [2021-11-20 07:36:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:18,243 INFO L470 AbstractCegarLoop]: Abstraction has 7494 states and 8668 transitions. [2021-11-20 07:36:18,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 8668 transitions. [2021-11-20 07:36:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 07:36:18,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:18,249 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:18,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:18,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:18,449 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:36:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1113206431, now seen corresponding path program 18 times [2021-11-20 07:36:18,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:18,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145143970] [2021-11-20 07:36:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:18,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:19,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:19,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145143970] [2021-11-20 07:36:19,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145143970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:19,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344576203] [2021-11-20 07:36:19,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:36:19,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:19,223 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:19,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-20 07:36:19,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-20 07:36:19,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-20 07:36:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:20,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:36:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:36:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:20,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:20,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:36:20,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:36:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 35 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:21,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344576203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:21,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:21,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2021-11-20 07:36:21,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993993466] [2021-11-20 07:36:21,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:21,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-20 07:36:21,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:21,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-20 07:36:21,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2021-11-20 07:36:21,114 INFO L87 Difference]: Start difference. First operand 7494 states and 8668 transitions. Second operand has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:24,575 INFO L93 Difference]: Finished difference Result 10335 states and 11831 transitions. [2021-11-20 07:36:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 07:36:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-20 07:36:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:24,585 INFO L225 Difference]: With dead ends: 10335 [2021-11-20 07:36:24,586 INFO L226 Difference]: Without dead ends: 10210 [2021-11-20 07:36:24,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=628, Invalid=7028, Unknown=0, NotChecked=0, Total=7656 [2021-11-20 07:36:24,587 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 982 mSDsluCounter, 6043 mSDsCounter, 0 mSdLazyCounter, 5006 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 5279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:24,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 6244 Invalid, 5279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 5006 Invalid, 0 Unknown, 150 Unchecked, 2.1s Time] [2021-11-20 07:36:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2021-11-20 07:36:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 7530. [2021-11-20 07:36:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7530 states, 7528 states have (on average 1.157279489904357) internal successors, (8712), 7529 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 8712 transitions. [2021-11-20 07:36:24,679 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 8712 transitions. Word has length 120 [2021-11-20 07:36:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:24,679 INFO L470 AbstractCegarLoop]: Abstraction has 7530 states and 8712 transitions. [2021-11-20 07:36:24,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 8712 transitions. [2021-11-20 07:36:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 07:36:24,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:24,686 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:24,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:24,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-20 07:36:24,887 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:36:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:24,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1939361278, now seen corresponding path program 13 times [2021-11-20 07:36:24,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358912126] [2021-11-20 07:36:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:24,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:36:26,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358912126] [2021-11-20 07:36:26,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358912126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055417761] [2021-11-20 07:36:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:36:26,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:26,017 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:26,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-20 07:36:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:26,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-20 07:36:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:26,158 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:36:26,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:36:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:36:27,240 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-20 07:36:27,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 07:36:29,510 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:36:29,511 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 23 treesize of output 21 [2021-11-20 07:36:31,061 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-11-20 07:36:31,062 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 55 treesize of output 37 [2021-11-20 07:36:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 18 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:31,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:34,578 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 07:36:34,579 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 206 treesize of output 166 [2021-11-20 07:36:34,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:36:34,591 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 162 treesize of output 156 [2021-11-20 07:36:34,622 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 07:36:34,622 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 48 treesize of output 39 [2021-11-20 07:36:34,691 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-11-20 07:36:34,691 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 [2021-11-20 07:36:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 23 proven. 404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:37,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055417761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:37,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:37,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 41, 41] total 104 [2021-11-20 07:36:37,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173553878] [2021-11-20 07:36:37,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:37,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-20 07:36:37,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-20 07:36:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=10253, Unknown=1, NotChecked=0, Total=10712 [2021-11-20 07:36:37,268 INFO L87 Difference]: Start difference. First operand 7530 states and 8712 transitions. Second operand has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:43,198 INFO L93 Difference]: Finished difference Result 13386 states and 15442 transitions. [2021-11-20 07:36:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-20 07:36:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-20 07:36:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:43,209 INFO L225 Difference]: With dead ends: 13386 [2021-11-20 07:36:43,209 INFO L226 Difference]: Without dead ends: 13311 [2021-11-20 07:36:43,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5109 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=965, Invalid=23214, Unknown=1, NotChecked=0, Total=24180 [2021-11-20 07:36:43,211 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 534 mSDsluCounter, 7264 mSDsCounter, 0 mSdLazyCounter, 5127 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 7439 SdHoareTripleChecker+Invalid, 6952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1800 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:43,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 7439 Invalid, 6952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5127 Invalid, 0 Unknown, 1800 Unchecked, 2.5s Time] [2021-11-20 07:36:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13311 states. [2021-11-20 07:36:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13311 to 10486. [2021-11-20 07:36:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10486 states, 10484 states have (on average 1.1583365127813812) internal successors, (12144), 10485 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10486 states to 10486 states and 12144 transitions. [2021-11-20 07:36:43,338 INFO L78 Accepts]: Start accepts. Automaton has 10486 states and 12144 transitions. Word has length 121 [2021-11-20 07:36:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:43,339 INFO L470 AbstractCegarLoop]: Abstraction has 10486 states and 12144 transitions. [2021-11-20 07:36:43,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.0865384615384617) internal successors, (321), 104 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:36:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10486 states and 12144 transitions. [2021-11-20 07:36:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 07:36:43,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:43,343 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:43,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:43,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:43,545 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:36:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 771443421, now seen corresponding path program 10 times [2021-11-20 07:36:43,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:36:43,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84120775] [2021-11-20 07:36:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:43,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:36:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 35 proven. 509 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:36:44,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:36:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84120775] [2021-11-20 07:36:44,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84120775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:36:44,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459229783] [2021-11-20 07:36:44,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:36:44,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:36:44,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:36:44,158 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:36:44,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-20 07:36:44,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:36:44,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:44,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-20 07:36:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:44,320 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:36:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:36:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 07:36:46,115 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-20 07:36:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 07:36:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 261 proven. 283 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:36:46,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:47,698 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 [2021-11-20 07:36:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 07:36:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 260 proven. 284 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:36:49,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459229783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:49,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:36:49,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 89 [2021-11-20 07:36:49,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626105606] [2021-11-20 07:36:49,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:49,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-20 07:36:49,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:36:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-20 07:36:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=7209, Unknown=0, NotChecked=0, Total=7832 [2021-11-20 07:36:49,318 INFO L87 Difference]: Start difference. First operand 10486 states and 12144 transitions. Second operand has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:09,909 INFO L93 Difference]: Finished difference Result 16415 states and 18424 transitions. [2021-11-20 07:37:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-20 07:37:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-20 07:37:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:09,925 INFO L225 Difference]: With dead ends: 16415 [2021-11-20 07:37:09,926 INFO L226 Difference]: Without dead ends: 15455 [2021-11-20 07:37:09,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19414 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=8459, Invalid=65253, Unknown=0, NotChecked=0, Total=73712 [2021-11-20 07:37:09,931 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 1933 mSDsluCounter, 10122 mSDsCounter, 0 mSdLazyCounter, 12712 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 10424 SdHoareTripleChecker+Invalid, 14421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 12712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1521 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:09,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1933 Valid, 10424 Invalid, 14421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 12712 Invalid, 0 Unknown, 1521 Unchecked, 5.8s Time] [2021-11-20 07:37:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15455 states. [2021-11-20 07:37:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15455 to 11785. [2021-11-20 07:37:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11785 states, 11783 states have (on average 1.158788084528558) internal successors, (13654), 11784 states have internal predecessors, (13654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11785 states to 11785 states and 13654 transitions. [2021-11-20 07:37:10,084 INFO L78 Accepts]: Start accepts. Automaton has 11785 states and 13654 transitions. Word has length 123 [2021-11-20 07:37:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:10,085 INFO L470 AbstractCegarLoop]: Abstraction has 11785 states and 13654 transitions. [2021-11-20 07:37:10,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.8764044943820224) internal successors, (345), 89 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 11785 states and 13654 transitions. [2021-11-20 07:37:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 07:37:10,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:10,091 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:10,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:10,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:10,292 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1756095170, now seen corresponding path program 19 times [2021-11-20 07:37:10,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696523315] [2021-11-20 07:37:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:11,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:11,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696523315] [2021-11-20 07:37:11,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696523315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:11,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212260246] [2021-11-20 07:37:11,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:37:11,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:11,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:11,027 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:11,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-20 07:37:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-20 07:37:11,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:12,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:12,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:37:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:13,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212260246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:13,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:13,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 66 [2021-11-20 07:37:13,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102990913] [2021-11-20 07:37:13,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:13,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-20 07:37:13,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-20 07:37:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3957, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 07:37:13,123 INFO L87 Difference]: Start difference. First operand 11785 states and 13654 transitions. Second operand has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:16,457 INFO L93 Difference]: Finished difference Result 13967 states and 15976 transitions. [2021-11-20 07:37:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-20 07:37:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 07:37:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:16,470 INFO L225 Difference]: With dead ends: 13967 [2021-11-20 07:37:16,470 INFO L226 Difference]: Without dead ends: 13967 [2021-11-20 07:37:16,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2139, Invalid=9203, Unknown=0, NotChecked=0, Total=11342 [2021-11-20 07:37:16,472 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 934 mSDsluCounter, 2429 mSDsCounter, 0 mSdLazyCounter, 3614 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:16,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2537 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3614 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:37:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13967 states. [2021-11-20 07:37:16,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13967 to 12027. [2021-11-20 07:37:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 12025 states have (on average 1.15983367983368) internal successors, (13947), 12026 states have internal predecessors, (13947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 13947 transitions. [2021-11-20 07:37:16,592 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 13947 transitions. Word has length 124 [2021-11-20 07:37:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:16,592 INFO L470 AbstractCegarLoop]: Abstraction has 12027 states and 13947 transitions. [2021-11-20 07:37:16,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.803030303030303) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 13947 transitions. [2021-11-20 07:37:16,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:37:16,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:16,598 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:16,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:16,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-20 07:37:16,799 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1679256965, now seen corresponding path program 14 times [2021-11-20 07:37:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631753307] [2021-11-20 07:37:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:16,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:37:17,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:17,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631753307] [2021-11-20 07:37:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631753307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:17,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822058048] [2021-11-20 07:37:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:37:17,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:17,317 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:17,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-20 07:37:17,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:37:17,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:17,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-20 07:37:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:37:18,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:19,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 07:37:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 120 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:37:19,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822058048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:19,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:19,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 50 [2021-11-20 07:37:19,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966947700] [2021-11-20 07:37:19,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:19,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 07:37:19,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 07:37:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:37:19,234 INFO L87 Difference]: Start difference. First operand 12027 states and 13947 transitions. Second operand has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:21,325 INFO L93 Difference]: Finished difference Result 16026 states and 18538 transitions. [2021-11-20 07:37:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:37:21,325 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-20 07:37:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:21,337 INFO L225 Difference]: With dead ends: 16026 [2021-11-20 07:37:21,337 INFO L226 Difference]: Without dead ends: 16026 [2021-11-20 07:37:21,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1259, Invalid=5547, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 07:37:21,338 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 613 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:21,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 3079 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 07:37:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16026 states. [2021-11-20 07:37:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16026 to 12447. [2021-11-20 07:37:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12447 states, 12445 states have (on average 1.159983929288871) internal successors, (14436), 12446 states have internal predecessors, (14436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12447 states to 12447 states and 14436 transitions. [2021-11-20 07:37:21,496 INFO L78 Accepts]: Start accepts. Automaton has 12447 states and 14436 transitions. Word has length 125 [2021-11-20 07:37:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:21,496 INFO L470 AbstractCegarLoop]: Abstraction has 12447 states and 14436 transitions. [2021-11-20 07:37:21,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.02) internal successors, (251), 51 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 12447 states and 14436 transitions. [2021-11-20 07:37:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-20 07:37:21,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:21,503 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:21,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:21,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:21,703 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 840045729, now seen corresponding path program 5 times [2021-11-20 07:37:21,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:21,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337354379] [2021-11-20 07:37:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:21,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 323 proven. 114 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:37:22,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:22,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337354379] [2021-11-20 07:37:22,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337354379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595931884] [2021-11-20 07:37:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:37:22,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:22,093 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:22,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-20 07:37:22,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 07:37:22,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 07:37:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:22,301 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:37:22,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:37:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:37:25,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:37:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595931884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:26,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:26,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 64 [2021-11-20 07:37:26,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203972177] [2021-11-20 07:37:26,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-20 07:37:26,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-20 07:37:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=3509, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:37:26,838 INFO L87 Difference]: Start difference. First operand 12447 states and 14436 transitions. Second operand has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:27,787 INFO L93 Difference]: Finished difference Result 15291 states and 17668 transitions. [2021-11-20 07:37:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:37:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-20 07:37:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:27,799 INFO L225 Difference]: With dead ends: 15291 [2021-11-20 07:37:27,799 INFO L226 Difference]: Without dead ends: 12831 [2021-11-20 07:37:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=798, Invalid=5844, Unknown=0, NotChecked=0, Total=6642 [2021-11-20 07:37:27,800 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 71 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:27,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1550 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2021-11-20 07:37:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2021-11-20 07:37:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 9639. [2021-11-20 07:37:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9637 states have (on average 1.1592819342118916) internal successors, (11172), 9638 states have internal predecessors, (11172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 11172 transitions. [2021-11-20 07:37:27,905 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 11172 transitions. Word has length 126 [2021-11-20 07:37:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:27,905 INFO L470 AbstractCegarLoop]: Abstraction has 9639 states and 11172 transitions. [2021-11-20 07:37:27,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.265625) internal successors, (273), 64 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 11172 transitions. [2021-11-20 07:37:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 07:37:27,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:27,910 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:27,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:28,110 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:28,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1101030624, now seen corresponding path program 11 times [2021-11-20 07:37:28,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:28,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792102977] [2021-11-20 07:37:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:28,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 153 proven. 432 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:37:28,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792102977] [2021-11-20 07:37:28,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792102977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201866664] [2021-11-20 07:37:28,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:37:28,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:28,894 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:28,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-20 07:37:29,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-20 07:37:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 07:37:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:29,104 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:37:29,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:37:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 190 proven. 395 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:37:30,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 231 proven. 354 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:37:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201866664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:32,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 70 [2021-11-20 07:37:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200982892] [2021-11-20 07:37:32,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:32,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-20 07:37:32,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:32,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-20 07:37:32,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 07:37:32,198 INFO L87 Difference]: Start difference. First operand 9639 states and 11172 transitions. Second operand has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:35,733 INFO L93 Difference]: Finished difference Result 11532 states and 13099 transitions. [2021-11-20 07:37:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 07:37:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-20 07:37:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:35,739 INFO L225 Difference]: With dead ends: 11532 [2021-11-20 07:37:35,740 INFO L226 Difference]: Without dead ends: 10487 [2021-11-20 07:37:35,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2598, Invalid=10974, Unknown=0, NotChecked=0, Total=13572 [2021-11-20 07:37:35,741 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 697 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 3271 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:35,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 2447 Invalid, 3329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3271 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:37:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2021-11-20 07:37:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 8804. [2021-11-20 07:37:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 8802 states have (on average 1.1563281072483527) internal successors, (10178), 8803 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 10178 transitions. [2021-11-20 07:37:35,831 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 10178 transitions. Word has length 127 [2021-11-20 07:37:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:35,832 INFO L470 AbstractCegarLoop]: Abstraction has 8804 states and 10178 transitions. [2021-11-20 07:37:35,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.5) internal successors, (315), 71 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 10178 transitions. [2021-11-20 07:37:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-20 07:37:35,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:35,836 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:35,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:36,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-20 07:37:36,036 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:36,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1004203597, now seen corresponding path program 20 times [2021-11-20 07:37:36,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:36,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061024594] [2021-11-20 07:37:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:36,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 38 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:36,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061024594] [2021-11-20 07:37:36,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061024594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35291377] [2021-11-20 07:37:36,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:37:36,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:36,966 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-20 07:37:37,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:37:37,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-20 07:37:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-20 07:37:40,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:37:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-20 07:37:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 231 proven. 461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:41,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:43,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-20 07:37:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-20 07:37:43,656 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 38 treesize of output 30 [2021-11-20 07:37:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 231 proven. 461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:43,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35291377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:43,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:43,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 92 [2021-11-20 07:37:43,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412564730] [2021-11-20 07:37:43,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:43,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-20 07:37:43,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-20 07:37:43,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=7859, Unknown=0, NotChecked=0, Total=8372 [2021-11-20 07:37:43,818 INFO L87 Difference]: Start difference. First operand 8804 states and 10178 transitions. Second operand has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:50,807 INFO L93 Difference]: Finished difference Result 10968 states and 12555 transitions. [2021-11-20 07:37:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-20 07:37:50,807 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have 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 [2021-11-20 07:37:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:50,815 INFO L225 Difference]: With dead ends: 10968 [2021-11-20 07:37:50,815 INFO L226 Difference]: Without dead ends: 10862 [2021-11-20 07:37:50,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1382, Invalid=21268, Unknown=0, NotChecked=0, Total=22650 [2021-11-20 07:37:50,817 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 1073 mSDsluCounter, 6300 mSDsCounter, 0 mSdLazyCounter, 4307 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 6776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2433 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:50,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 6521 Invalid, 6776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4307 Invalid, 0 Unknown, 2433 Unchecked, 2.1s Time] [2021-11-20 07:37:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10862 states. [2021-11-20 07:37:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10862 to 9509. [2021-11-20 07:37:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9507 states have (on average 1.1570421794467234) internal successors, (11000), 9508 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 11000 transitions. [2021-11-20 07:37:50,943 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 11000 transitions. Word has length 129 [2021-11-20 07:37:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:50,943 INFO L470 AbstractCegarLoop]: Abstraction has 9509 states and 11000 transitions. [2021-11-20 07:37:50,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.5434782608695654) internal successors, (326), 92 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:37:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 11000 transitions. [2021-11-20 07:37:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 07:37:50,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:50,948 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:50,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-20 07:37:51,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-20 07:37:51,173 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:37:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 251620040, now seen corresponding path program 6 times [2021-11-20 07:37:51,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:37:51,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903478481] [2021-11-20 07:37:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:51,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:37:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 18 proven. 449 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:37:51,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:37:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903478481] [2021-11-20 07:37:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903478481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:37:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700151878] [2021-11-20 07:37:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:37:51,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:37:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:37:51,804 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:37:51,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-20 07:37:52,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-20 07:37:52,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:37:52,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-20 07:37:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:52,048 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:37:52,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:37:52,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:37:53,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:37:53,251 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-20 07:37:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-20 07:37:55,612 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:37:55,612 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 56 treesize of output 48 [2021-11-20 07:37:55,622 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:37:55,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 33 [2021-11-20 07:37:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 216 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:37:55,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:58,522 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 [2021-11-20 07:37:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 250 proven. 217 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:37:59,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700151878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:59,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:37:59,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 73 [2021-11-20 07:37:59,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855310436] [2021-11-20 07:37:59,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:59,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-20 07:37:59,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:37:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-20 07:37:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4847, Unknown=1, NotChecked=0, Total=5256 [2021-11-20 07:37:59,989 INFO L87 Difference]: Start difference. First operand 9509 states and 11000 transitions. Second operand has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:05,053 INFO L93 Difference]: Finished difference Result 11785 states and 13569 transitions. [2021-11-20 07:38:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-20 07:38:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-20 07:38:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:05,060 INFO L225 Difference]: With dead ends: 11785 [2021-11-20 07:38:05,060 INFO L226 Difference]: Without dead ends: 8674 [2021-11-20 07:38:05,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1688, Invalid=17493, Unknown=1, NotChecked=0, Total=19182 [2021-11-20 07:38:05,062 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 549 mSDsluCounter, 3461 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3563 SdHoareTripleChecker+Invalid, 2949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:05,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 3563 Invalid, 2949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2321 Invalid, 0 Unknown, 536 Unchecked, 1.1s Time] [2021-11-20 07:38:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2021-11-20 07:38:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 6173. [2021-11-20 07:38:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6171 states have (on average 1.1544320207421812) internal successors, (7124), 6172 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 7124 transitions. [2021-11-20 07:38:05,142 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 7124 transitions. Word has length 130 [2021-11-20 07:38:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:05,142 INFO L470 AbstractCegarLoop]: Abstraction has 6173 states and 7124 transitions. [2021-11-20 07:38:05,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.698630136986301) internal successors, (343), 73 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 7124 transitions. [2021-11-20 07:38:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 07:38:05,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:05,146 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:05,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:05,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-20 07:38:05,346 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:38:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1075876496, now seen corresponding path program 15 times [2021-11-20 07:38:05,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56261269] [2021-11-20 07:38:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:05,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:06,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56261269] [2021-11-20 07:38:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56261269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879037618] [2021-11-20 07:38:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:38:06,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:06,319 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:06,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-20 07:38:06,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 07:38:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 07:38:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:06,601 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 10 treesize of output 8 [2021-11-20 07:38:07,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:38:07,442 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:38:07,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:38:10,011 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:38:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:38:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:10,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:20,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:38:20,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:38:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 20 proven. 513 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:21,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879037618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:21,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:21,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30, 29] total 87 [2021-11-20 07:38:21,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229321974] [2021-11-20 07:38:21,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:21,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-20 07:38:21,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-20 07:38:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7239, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 07:38:21,956 INFO L87 Difference]: Start difference. First operand 6173 states and 7124 transitions. Second operand has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:26,142 INFO L93 Difference]: Finished difference Result 13515 states and 15554 transitions. [2021-11-20 07:38:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-20 07:38:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 07:38:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:26,148 INFO L225 Difference]: With dead ends: 13515 [2021-11-20 07:38:26,148 INFO L226 Difference]: Without dead ends: 7522 [2021-11-20 07:38:26,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=437, Invalid=13605, Unknown=0, NotChecked=0, Total=14042 [2021-11-20 07:38:26,150 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 267 mSDsluCounter, 7532 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 7655 SdHoareTripleChecker+Invalid, 5175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1062 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:26,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 7655 Invalid, 5175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4096 Invalid, 0 Unknown, 1062 Unchecked, 1.8s Time] [2021-11-20 07:38:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7522 states. [2021-11-20 07:38:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7522 to 6378. [2021-11-20 07:38:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6376 states have (on average 1.1540150564617315) internal successors, (7358), 6377 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 7358 transitions. [2021-11-20 07:38:26,216 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 7358 transitions. Word has length 133 [2021-11-20 07:38:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:26,217 INFO L470 AbstractCegarLoop]: Abstraction has 6378 states and 7358 transitions. [2021-11-20 07:38:26,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.2988505747126435) internal successors, (374), 87 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 7358 transitions. [2021-11-20 07:38:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 07:38:26,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:26,220 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:26,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:26,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:26,421 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:38:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:26,421 INFO L85 PathProgramCache]: Analyzing trace with hash -870571629, now seen corresponding path program 16 times [2021-11-20 07:38:26,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:26,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811668417] [2021-11-20 07:38:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:26,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 120 proven. 450 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:26,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811668417] [2021-11-20 07:38:26,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811668417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820114346] [2021-11-20 07:38:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:38:26,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:26,938 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:26,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-20 07:38:27,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:38:27,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-20 07:38:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:27,082 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:38:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:38:27,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:38:28,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:38:28,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-20 07:38:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:32,255 INFO L354 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2021-11-20 07:38:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 37 [2021-11-20 07:38:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 162 proven. 408 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:32,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:36,487 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-20 07:38:36,488 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 227 treesize of output 187 [2021-11-20 07:38:36,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:38:36,496 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 183 treesize of output 177 [2021-11-20 07:38:36,513 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-20 07:38:36,514 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 138 treesize of output 129 [2021-11-20 07:38:36,585 INFO L354 Elim1Store]: treesize reduction 5, result has 85.7 percent of original size [2021-11-20 07:38:36,585 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 85 treesize of output 97 [2021-11-20 07:38:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 190 proven. 380 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:44,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820114346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:44,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:44,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 39, 39] total 102 [2021-11-20 07:38:44,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666627170] [2021-11-20 07:38:44,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:44,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-20 07:38:44,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-20 07:38:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=9342, Unknown=0, NotChecked=0, Total=10506 [2021-11-20 07:38:44,630 INFO L87 Difference]: Start difference. First operand 6378 states and 7358 transitions. Second operand has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:40,385 INFO L93 Difference]: Finished difference Result 17205 states and 19966 transitions. [2021-11-20 07:39:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2021-11-20 07:39:40,386 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-20 07:39:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:40,398 INFO L225 Difference]: With dead ends: 17205 [2021-11-20 07:39:40,398 INFO L226 Difference]: Without dead ends: 17205 [2021-11-20 07:39:40,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54752 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=24819, Invalid=119961, Unknown=0, NotChecked=0, Total=144780 [2021-11-20 07:39:40,405 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 3207 mSDsluCounter, 4295 mSDsCounter, 0 mSdLazyCounter, 6735 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3207 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 9470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 6735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1739 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:40,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3207 Valid, 4389 Invalid, 9470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 6735 Invalid, 0 Unknown, 1739 Unchecked, 4.8s Time] [2021-11-20 07:39:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17205 states. [2021-11-20 07:39:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17205 to 12806. [2021-11-20 07:39:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12806 states, 12804 states have (on average 1.1643236488597313) internal successors, (14908), 12805 states have internal predecessors, (14908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12806 states to 12806 states and 14908 transitions. [2021-11-20 07:39:40,584 INFO L78 Accepts]: Start accepts. Automaton has 12806 states and 14908 transitions. Word has length 137 [2021-11-20 07:39:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 12806 states and 14908 transitions. [2021-11-20 07:39:40,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 3.950980392156863) internal successors, (403), 103 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 12806 states and 14908 transitions. [2021-11-20 07:39:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 07:39:40,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:40,592 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:40,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:40,809 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:39:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1798136699, now seen corresponding path program 21 times [2021-11-20 07:39:40,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127150960] [2021-11-20 07:39:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:40,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:39:41,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127150960] [2021-11-20 07:39:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127150960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113010935] [2021-11-20 07:39:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:39:41,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:41,870 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:41,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-20 07:39:42,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-20 07:39:42,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:39:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-20 07:39:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:39:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 07:39:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:39:43,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:43,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:39:43,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:39:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 41 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:39:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113010935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:44,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:44,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 63 [2021-11-20 07:39:44,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396595116] [2021-11-20 07:39:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:44,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 07:39:44,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 07:39:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 07:39:44,290 INFO L87 Difference]: Start difference. First operand 12806 states and 14908 transitions. Second operand has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:48,749 INFO L93 Difference]: Finished difference Result 19191 states and 22379 transitions. [2021-11-20 07:39:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:39:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-11-20 07:39:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:48,766 INFO L225 Difference]: With dead ends: 19191 [2021-11-20 07:39:48,766 INFO L226 Difference]: Without dead ends: 19076 [2021-11-20 07:39:48,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 249 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=630, Invalid=8876, Unknown=0, NotChecked=0, Total=9506 [2021-11-20 07:39:48,767 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 606 mSDsluCounter, 7601 mSDsCounter, 0 mSdLazyCounter, 5990 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 7840 SdHoareTripleChecker+Invalid, 6251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:48,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 7840 Invalid, 6251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5990 Invalid, 0 Unknown, 222 Unchecked, 2.7s Time] [2021-11-20 07:39:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19076 states. [2021-11-20 07:39:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19076 to 12960. [2021-11-20 07:39:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12958 states have (on average 1.1639141842876988) internal successors, (15082), 12959 states have internal predecessors, (15082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 15082 transitions. [2021-11-20 07:39:49,037 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 15082 transitions. Word has length 138 [2021-11-20 07:39:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:49,037 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 15082 transitions. [2021-11-20 07:39:49,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.380952380952381) internal successors, (213), 63 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:39:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 15082 transitions. [2021-11-20 07:39:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 07:39:49,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:49,040 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:49,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:49,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:49,245 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:39:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -967959485, now seen corresponding path program 12 times [2021-11-20 07:39:49,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:49,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670890070] [2021-11-20 07:39:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:49,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 41 proven. 718 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:49,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670890070] [2021-11-20 07:39:49,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670890070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549664648] [2021-11-20 07:39:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:39:49,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:49,998 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:50,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-20 07:39:50,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-20 07:39:50,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:39:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-20 07:39:50,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:50,566 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:39:50,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:39:51,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:39:53,733 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 07:39:53,733 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 40 treesize of output 30 [2021-11-20 07:39:53,736 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 [2021-11-20 07:39:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 383 proven. 376 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:53,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:55,653 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 26 treesize of output 24 [2021-11-20 07:39:55,655 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 30 [2021-11-20 07:39:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 383 proven. 376 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:57,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549664648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:57,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:57,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 99 [2021-11-20 07:39:57,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073856958] [2021-11-20 07:39:57,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:57,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-20 07:39:57,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-20 07:39:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=8933, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 07:39:57,879 INFO L87 Difference]: Start difference. First operand 12960 states and 15082 transitions. Second operand has 99 states, 99 states have (on average 4.03030303030303) internal successors, (399), 99 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:04,365 INFO L93 Difference]: Finished difference Result 18832 states and 22213 transitions. [2021-11-20 07:40:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-20 07:40:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.03030303030303) internal successors, (399), 99 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-20 07:40:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:04,379 INFO L225 Difference]: With dead ends: 18832 [2021-11-20 07:40:04,379 INFO L226 Difference]: Without dead ends: 17345 [2021-11-20 07:40:04,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8579 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3086, Invalid=29494, Unknown=0, NotChecked=0, Total=32580 [2021-11-20 07:40:04,381 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 715 mSDsluCounter, 3687 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 3792 SdHoareTripleChecker+Invalid, 3953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:04,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 3792 Invalid, 3953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3385 Invalid, 0 Unknown, 474 Unchecked, 1.6s Time] [2021-11-20 07:40:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2021-11-20 07:40:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 14475. [2021-11-20 07:40:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14475 states, 14473 states have (on average 1.165618738340358) internal successors, (16870), 14474 states have internal predecessors, (16870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14475 states to 14475 states and 16870 transitions. [2021-11-20 07:40:04,591 INFO L78 Accepts]: Start accepts. Automaton has 14475 states and 16870 transitions. Word has length 141 [2021-11-20 07:40:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:04,591 INFO L470 AbstractCegarLoop]: Abstraction has 14475 states and 16870 transitions. [2021-11-20 07:40:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.03030303030303) internal successors, (399), 99 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14475 states and 16870 transitions. [2021-11-20 07:40:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 07:40:04,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:04,595 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:04,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:04,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:04,795 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:40:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -334147048, now seen corresponding path program 22 times [2021-11-20 07:40:04,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074290939] [2021-11-20 07:40:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:04,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 276 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:05,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074290939] [2021-11-20 07:40:05,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074290939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860079877] [2021-11-20 07:40:05,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:40:05,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:05,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:05,637 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:05,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-20 07:40:05,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:40:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:40:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-20 07:40:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:05,790 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:40:05,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:40:06,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 07:40:08,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:40:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 07:40:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 338 proven. 523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:08,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:10,721 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 [2021-11-20 07:40:10,723 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 [2021-11-20 07:40:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 378 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:14,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860079877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:14,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:40:14,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 39] total 98 [2021-11-20 07:40:14,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383398468] [2021-11-20 07:40:14,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:14,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-20 07:40:14,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-20 07:40:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=8765, Unknown=0, NotChecked=0, Total=9702 [2021-11-20 07:40:14,102 INFO L87 Difference]: Start difference. First operand 14475 states and 16870 transitions. Second operand has 99 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:29,576 INFO L93 Difference]: Finished difference Result 21986 states and 25564 transitions. [2021-11-20 07:40:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-20 07:40:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-20 07:40:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:29,591 INFO L225 Difference]: With dead ends: 21986 [2021-11-20 07:40:29,591 INFO L226 Difference]: Without dead ends: 21986 [2021-11-20 07:40:29,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8469 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=9048, Invalid=39572, Unknown=0, NotChecked=0, Total=48620 [2021-11-20 07:40:29,594 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2136 mSDsluCounter, 5030 mSDsCounter, 0 mSdLazyCounter, 6840 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 7779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 6840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:29,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 5172 Invalid, 7779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 6840 Invalid, 0 Unknown, 500 Unchecked, 3.9s Time] [2021-11-20 07:40:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-11-20 07:40:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 14903. [2021-11-20 07:40:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14903 states, 14901 states have (on average 1.1668344406415676) internal successors, (17387), 14902 states have internal predecessors, (17387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14903 states to 14903 states and 17387 transitions. [2021-11-20 07:40:29,824 INFO L78 Accepts]: Start accepts. Automaton has 14903 states and 17387 transitions. Word has length 142 [2021-11-20 07:40:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:29,825 INFO L470 AbstractCegarLoop]: Abstraction has 14903 states and 17387 transitions. [2021-11-20 07:40:29,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 99 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:29,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14903 states and 17387 transitions. [2021-11-20 07:40:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-20 07:40:29,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:29,828 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:29,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:30,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:30,029 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:40:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:30,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1778120008, now seen corresponding path program 23 times [2021-11-20 07:40:30,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943830529] [2021-11-20 07:40:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:30,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 588 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:30,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943830529] [2021-11-20 07:40:30,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943830529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455693692] [2021-11-20 07:40:30,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:40:30,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:30,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:30,766 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-20 07:40:30,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-20 07:40:30,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:40:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 07:40:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:30,954 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:40:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-20 07:40:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 617 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:32,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 617 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:33,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455693692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:33,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:40:33,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 93 [2021-11-20 07:40:33,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460480412] [2021-11-20 07:40:33,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-20 07:40:34,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-20 07:40:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1392, Invalid=7164, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 07:40:34,001 INFO L87 Difference]: Start difference. First operand 14903 states and 17387 transitions. Second operand has 93 states, 93 states have (on average 3.903225806451613) internal successors, (363), 93 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:42,251 INFO L93 Difference]: Finished difference Result 28263 states and 32818 transitions. [2021-11-20 07:40:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-20 07:40:42,251 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.903225806451613) internal successors, (363), 93 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-11-20 07:40:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:42,274 INFO L225 Difference]: With dead ends: 28263 [2021-11-20 07:40:42,275 INFO L226 Difference]: Without dead ends: 25203 [2021-11-20 07:40:42,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=14247, Invalid=53613, Unknown=0, NotChecked=0, Total=67860 [2021-11-20 07:40:42,279 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 1991 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:42,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 2285 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:40:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25203 states. [2021-11-20 07:40:42,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25203 to 16178. [2021-11-20 07:40:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16178 states, 16176 states have (on average 1.1676557863501484) internal successors, (18888), 16177 states have internal predecessors, (18888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16178 states to 16178 states and 18888 transitions. [2021-11-20 07:40:42,571 INFO L78 Accepts]: Start accepts. Automaton has 16178 states and 18888 transitions. Word has length 152 [2021-11-20 07:40:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 16178 states and 18888 transitions. [2021-11-20 07:40:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.903225806451613) internal successors, (363), 93 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 16178 states and 18888 transitions. [2021-11-20 07:40:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 07:40:42,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:42,575 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:42,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:42,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:42,793 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:40:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1491861844, now seen corresponding path program 7 times [2021-11-20 07:40:42,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:42,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114621441] [2021-11-20 07:40:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:42,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:40:43,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:43,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114621441] [2021-11-20 07:40:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114621441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957781595] [2021-11-20 07:40:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:40:43,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:43,526 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-20 07:40:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-20 07:40:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:43,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 07:40:44,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 07:40:44,693 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-20 07:40:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 07:40:47,104 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 07:40:47,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-11-20 07:40:47,175 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 23 proven. 680 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:40:47,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:57,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-20 07:40:57,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-20 07:40:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 22 proven. 681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:40:58,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957781595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:58,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:40:58,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 75 [2021-11-20 07:40:58,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890303132] [2021-11-20 07:40:58,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:58,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-20 07:40:58,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-20 07:40:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2021-11-20 07:40:58,162 INFO L87 Difference]: Start difference. First operand 16178 states and 18888 transitions. Second operand has 75 states, 75 states have (on average 4.466666666666667) internal successors, (335), 75 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:41:00,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:41:00,190 INFO L93 Difference]: Finished difference Result 23213 states and 26867 transitions. [2021-11-20 07:41:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:41:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.466666666666667) internal successors, (335), 75 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-20 07:41:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:41:00,208 INFO L225 Difference]: With dead ends: 23213 [2021-11-20 07:41:00,209 INFO L226 Difference]: Without dead ends: 17281 [2021-11-20 07:41:00,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=331, Invalid=7679, Unknown=0, NotChecked=0, Total=8010 [2021-11-20 07:41:00,210 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 249 mSDsluCounter, 6992 mSDsCounter, 0 mSdLazyCounter, 3054 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 7140 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:41:00,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 7140 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3054 Invalid, 0 Unknown, 790 Unchecked, 1.2s Time] [2021-11-20 07:41:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-20 07:41:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 16332. [2021-11-20 07:41:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16332 states, 16330 states have (on average 1.1672382118799756) internal successors, (19061), 16331 states have internal predecessors, (19061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:41:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16332 states to 16332 states and 19061 transitions. [2021-11-20 07:41:00,416 INFO L78 Accepts]: Start accepts. Automaton has 16332 states and 19061 transitions. Word has length 154 [2021-11-20 07:41:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:41:00,417 INFO L470 AbstractCegarLoop]: Abstraction has 16332 states and 19061 transitions. [2021-11-20 07:41:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.466666666666667) internal successors, (335), 75 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:41:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 16332 states and 19061 transitions. [2021-11-20 07:41:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 07:41:00,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:41:00,420 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:41:00,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-20 07:41:00,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-20 07:41:00,621 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-11-20 07:41:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:41:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 251896469, now seen corresponding path program 24 times [2021-11-20 07:41:00,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:41:00,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096636678] [2021-11-20 07:41:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:41:00,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:41:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 47 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:41:01,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:41:01,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096636678] [2021-11-20 07:41:01,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096636678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:41:01,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298808086] [2021-11-20 07:41:01,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:41:01,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:41:01,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:41:01,485 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:41:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a057d47a-1fe3-4a35-8760-037b467b91d6/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-20 07:41:02,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-20 07:41:02,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:41:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 212 conjunts are in the unsatisfiable core [2021-11-20 07:41:02,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:41:02,617 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 10 treesize of output 8 [2021-11-20 07:41:04,021 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 11 treesize of output 7 [2021-11-20 07:41:04,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27