./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G --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 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:36:22,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:36:22,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:36:22,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:36:22,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:36:22,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:36:22,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:36:22,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:36:22,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:36:22,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:36:22,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:36:22,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:36:22,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:36:22,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:36:22,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:36:22,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:36:22,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:36:22,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:36:22,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:36:22,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:36:22,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:36:22,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:36:22,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:36:22,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:36:22,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:36:22,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:36:22,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:36:22,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:36:22,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:36:22,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:36:22,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:36:22,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:36:22,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:36:22,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:36:22,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:36:22,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:36:22,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:36:22,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:36:22,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:36:22,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:36:22,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:36:22,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:36:22,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:36:22,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:36:22,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:36:22,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:36:22,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:36:22,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:36:22,968 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:36:22,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:36:22,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:36:22,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:36:22,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:36:22,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:36:22,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:36:22,971 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:36:22,971 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:36:22,971 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:36:22,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:36:22,972 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:36:22,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:36:22,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:36:22,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:36:22,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:36:22,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:36:22,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:36:22,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:36:22,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:36:22,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:36:22,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:36:22,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:36:22,975 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_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 [2021-11-23 13:36:23,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:36:23,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:36:23,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:36:23,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:36:23,377 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:36:23,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-11-23 13:36:23,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/data/f501bf786/ce0a137c46bc4541a3fb5b13b39eaa08/FLAGe84401732 [2021-11-23 13:36:24,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:36:24,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-11-23 13:36:24,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/data/f501bf786/ce0a137c46bc4541a3fb5b13b39eaa08/FLAGe84401732 [2021-11-23 13:36:24,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/data/f501bf786/ce0a137c46bc4541a3fb5b13b39eaa08 [2021-11-23 13:36:24,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:36:24,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:36:24,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:36:24,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:36:24,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:36:24,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:36:24" (1/1) ... [2021-11-23 13:36:24,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7578f97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:24, skipping insertion in model container [2021-11-23 13:36:24,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:36:24" (1/1) ... [2021-11-23 13:36:24,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:36:24,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:36:25,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:36:25,039 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:36:25,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:36:25,166 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:36:25,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25 WrapperNode [2021-11-23 13:36:25,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:36:25,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:36:25,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:36:25,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:36:25,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,247 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2021-11-23 13:36:25,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:36:25,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:36:25,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:36:25,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:36:25,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:36:25,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:36:25,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:36:25,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:36:25,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (1/1) ... [2021-11-23 13:36:25,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:36:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:25,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:36:25,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:36:25,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:36:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:36:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:36:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:36:25,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:36:25,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:36:25,547 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:36:25,548 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:36:25,898 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:36:25,905 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:36:25,905 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:36:25,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:36:25 BoogieIcfgContainer [2021-11-23 13:36:25,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:36:25,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:36:25,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:36:25,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:36:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:36:24" (1/3) ... [2021-11-23 13:36:25,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7bdccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:36:25, skipping insertion in model container [2021-11-23 13:36:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:36:25" (2/3) ... [2021-11-23 13:36:25,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7bdccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:36:25, skipping insertion in model container [2021-11-23 13:36:25,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:36:25" (3/3) ... [2021-11-23 13:36:25,928 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-11-23 13:36:25,934 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:36:25,934 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-23 13:36:26,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:36:26,019 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 [2021-11-23 13:36:26,019 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-23 13:36:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:36:26,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:26,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:26,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-23 13:36:26,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:26,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119414915] [2021-11-23 13:36:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:26,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:26,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119414915] [2021-11-23 13:36:26,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119414915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:26,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:26,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297486656] [2021-11-23 13:36:26,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:26,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:26,457 INFO L87 Difference]: Start difference. First operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-23 13:36:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:26,564 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-11-23 13:36:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:26,567 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 [2021-11-23 13:36:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:26,577 INFO L225 Difference]: With dead ends: 106 [2021-11-23 13:36:26,578 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 13:36:26,593 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 [2021-11-23 13:36:26,599 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:26,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 175 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 13:36:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2021-11-23 13:36:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-11-23 13:36:26,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 7 [2021-11-23 13:36:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:26,654 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-11-23 13:36:26,654 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) [2021-11-23 13:36:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-11-23 13:36:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:36:26,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:26,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:26,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:36:26,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-23 13:36:26,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:26,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303339048] [2021-11-23 13:36:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:26,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:26,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303339048] [2021-11-23 13:36:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303339048] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:26,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:26,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:36:26,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389010063] [2021-11-23 13:36:26,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:26,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:36:26,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:26,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:36:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:26,747 INFO L87 Difference]: Start difference. First operand 58 states and 68 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) [2021-11-23 13:36:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:26,790 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-11-23 13:36:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:36:26,790 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 [2021-11-23 13:36:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:26,791 INFO L225 Difference]: With dead ends: 56 [2021-11-23 13:36:26,792 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:36:26,792 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 [2021-11-23 13:36:26,794 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:26,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:36:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-23 13:36:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-23 13:36:26,802 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 7 [2021-11-23 13:36:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:26,803 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-23 13:36:26,803 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) [2021-11-23 13:36:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-23 13:36:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:36:26,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:26,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:26,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:36:26,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-23 13:36:26,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520586086] [2021-11-23 13:36:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:26,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:26,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520586086] [2021-11-23 13:36:26,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520586086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:26,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:26,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:26,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950258247] [2021-11-23 13:36:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:26,941 INFO L87 Difference]: Start difference. First operand 56 states and 66 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) [2021-11-23 13:36:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,104 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-11-23 13:36:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:27,104 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 [2021-11-23 13:36:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,106 INFO L225 Difference]: With dead ends: 103 [2021-11-23 13:36:27,106 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 13:36:27,107 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 [2021-11-23 13:36:27,108 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 115 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 13:36:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2021-11-23 13:36:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-23 13:36:27,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 7 [2021-11-23 13:36:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,118 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-23 13:36:27,118 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) [2021-11-23 13:36:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-23 13:36:27,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:36:27,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:36:27,120 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-23 13:36:27,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398077770] [2021-11-23 13:36:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398077770] [2021-11-23 13:36:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398077770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:27,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:27,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:27,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518686230] [2021-11-23 13:36:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:27,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:27,219 INFO L87 Difference]: Start difference. First operand 58 states and 69 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) [2021-11-23 13:36:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,257 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-11-23 13:36:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:27,260 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 [2021-11-23 13:36:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,261 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:36:27,262 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 13:36:27,262 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 [2021-11-23 13:36:27,273 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 13:36:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 13:36:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-11-23 13:36:27,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 9 [2021-11-23 13:36:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,294 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-11-23 13:36:27,294 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) [2021-11-23 13:36:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-11-23 13:36:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:36:27,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:36:27,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-23 13:36:27,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288880846] [2021-11-23 13:36:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288880846] [2021-11-23 13:36:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288880846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:27,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:27,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:27,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719126370] [2021-11-23 13:36:27,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:27,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:27,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:27,355 INFO L87 Difference]: Start difference. First operand 57 states and 68 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) [2021-11-23 13:36:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,375 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-11-23 13:36:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:27,376 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 [2021-11-23 13:36:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,378 INFO L225 Difference]: With dead ends: 104 [2021-11-23 13:36:27,378 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 13:36:27,378 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 [2021-11-23 13:36:27,380 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 13:36:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-11-23 13:36:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-23 13:36:27,388 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 9 [2021-11-23 13:36:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,389 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-23 13:36:27,389 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) [2021-11-23 13:36:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-23 13:36:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:36:27,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:36:27,391 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-23 13:36:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27612993] [2021-11-23 13:36:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27612993] [2021-11-23 13:36:27,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27612993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:27,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:27,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:36:27,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574882164] [2021-11-23 13:36:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:27,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:36:27,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:36:27,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:27,424 INFO L87 Difference]: Start difference. First operand 68 states and 82 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) [2021-11-23 13:36:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,454 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-11-23 13:36:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:36:27,454 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 [2021-11-23 13:36:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,456 INFO L225 Difference]: With dead ends: 66 [2021-11-23 13:36:27,456 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 13:36:27,456 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 [2021-11-23 13:36:27,457 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 13:36:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-23 13:36:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-23 13:36:27,471 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 9 [2021-11-23 13:36:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,471 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-23 13:36:27,472 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) [2021-11-23 13:36:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-23 13:36:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:36:27,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:36:27,473 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-23 13:36:27,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068210070] [2021-11-23 13:36:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068210070] [2021-11-23 13:36:27,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068210070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:27,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:27,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:36:27,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081034467] [2021-11-23 13:36:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:27,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:36:27,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:36:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:36:27,595 INFO L87 Difference]: Start difference. First operand 66 states and 80 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) [2021-11-23 13:36:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,701 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-11-23 13:36:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:36:27,701 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 [2021-11-23 13:36:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,702 INFO L225 Difference]: With dead ends: 104 [2021-11-23 13:36:27,702 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 13:36:27,703 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 [2021-11-23 13:36:27,704 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 13:36:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-11-23 13:36:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.537037037037037) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-23 13:36:27,722 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 9 [2021-11-23 13:36:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,723 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-23 13:36:27,723 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) [2021-11-23 13:36:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-23 13:36:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:36:27,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:36:27,724 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-23 13:36:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470076476] [2021-11-23 13:36:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470076476] [2021-11-23 13:36:27,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470076476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:27,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:27,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:27,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744398368] [2021-11-23 13:36:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:27,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:27,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:27,812 INFO L87 Difference]: Start difference. First operand 68 states and 83 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) [2021-11-23 13:36:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:27,845 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2021-11-23 13:36:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:27,845 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 [2021-11-23 13:36:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:27,846 INFO L225 Difference]: With dead ends: 67 [2021-11-23 13:36:27,846 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 13:36:27,847 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 [2021-11-23 13:36:27,847 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:27,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 13:36:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-23 13:36:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-11-23 13:36:27,852 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2021-11-23 13:36:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:27,853 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-11-23 13:36:27,853 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) [2021-11-23 13:36:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-11-23 13:36:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:36:27,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:27,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:27,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:36:27,854 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-23 13:36:27,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:27,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026888947] [2021-11-23 13:36:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:27,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026888947] [2021-11-23 13:36:27,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026888947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736686366] [2021-11-23 13:36:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:27,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:27,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:27,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:36:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:36:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:28,149 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:36:28,150 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 [2021-11-23 13:36:28,170 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 15 treesize of output 13 [2021-11-23 13:36:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:28,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:28,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736686366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:28,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:28,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 13:36:28,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321433774] [2021-11-23 13:36:28,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:36:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:36:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:28,624 INFO L87 Difference]: Start difference. First operand 67 states and 82 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) [2021-11-23 13:36:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:28,872 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-11-23 13:36:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:36:28,873 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 [2021-11-23 13:36:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:28,874 INFO L225 Difference]: With dead ends: 158 [2021-11-23 13:36:28,875 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 13:36:28,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:36:28,878 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 277 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:28,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 326 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:36:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 13:36:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 62. [2021-11-23 13:36:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.48) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-11-23 13:36:28,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2021-11-23 13:36:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-23 13:36:28,888 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) [2021-11-23 13:36:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-11-23 13:36:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:36:28,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:28,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:28,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 13:36:29,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:29,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:29,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-23 13:36:29,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:29,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985782030] [2021-11-23 13:36:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:29,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:29,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985782030] [2021-11-23 13:36:29,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985782030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594670469] [2021-11-23 13:36:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:29,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:29,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:29,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:29,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:36:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:36:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:29,319 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:36:29,320 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 [2021-11-23 13:36:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:29,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594670469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:29,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:29,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-23 13:36:29,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84635142] [2021-11-23 13:36:29,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:29,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 13:36:29,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 13:36:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:36:29,646 INFO L87 Difference]: Start difference. First operand 62 states and 74 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) [2021-11-23 13:36:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:29,850 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-11-23 13:36:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:36:29,850 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 [2021-11-23 13:36:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:29,851 INFO L225 Difference]: With dead ends: 130 [2021-11-23 13:36:29,851 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 13:36:29,852 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 [2021-11-23 13:36:29,853 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 487 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:29,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 295 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 13:36:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-11-23 13:36:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-23 13:36:29,862 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2021-11-23 13:36:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:29,863 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-23 13:36:29,863 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) [2021-11-23 13:36:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-23 13:36:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:36:29,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:29,868 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:29,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:30,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:36:30,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash 172810813, now seen corresponding path program 1 times [2021-11-23 13:36:30,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307300286] [2021-11-23 13:36:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307300286] [2021-11-23 13:36:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307300286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474549622] [2021-11-23 13:36:30,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:30,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:30,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:30,181 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,218 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-11-23 13:36:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:36:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,220 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:36:30,220 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 13:36:30,220 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 [2021-11-23 13:36:30,221 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 13:36:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-23 13:36:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-23 13:36:30,224 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 14 [2021-11-23 13:36:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,225 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-23 13:36:30,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-23 13:36:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:36:30,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:36:30,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175016, now seen corresponding path program 1 times [2021-11-23 13:36:30,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247700663] [2021-11-23 13:36:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247700663] [2021-11-23 13:36:30,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247700663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:30,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265805603] [2021-11-23 13:36:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:30,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:30,259 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,290 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-11-23 13:36:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:30,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:36:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,291 INFO L225 Difference]: With dead ends: 50 [2021-11-23 13:36:30,291 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 13:36:30,291 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 [2021-11-23 13:36:30,292 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 13:36:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 13:36:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-23 13:36:30,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 15 [2021-11-23 13:36:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,296 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-23 13:36:30,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-23 13:36:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:36:30,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 13:36:30,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175017, now seen corresponding path program 1 times [2021-11-23 13:36:30,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396303051] [2021-11-23 13:36:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396303051] [2021-11-23 13:36:30,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396303051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:36:30,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243675471] [2021-11-23 13:36:30,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:36:30,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:36:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:36:30,364 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,445 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-11-23 13:36:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:36:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 13:36:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,446 INFO L225 Difference]: With dead ends: 67 [2021-11-23 13:36:30,446 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 13:36:30,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:36:30,448 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 59 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 13:36:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-11-23 13:36:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-11-23 13:36:30,452 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 15 [2021-11-23 13:36:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,454 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-11-23 13:36:30,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-11-23 13:36:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:36:30,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:36:30,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312828, now seen corresponding path program 1 times [2021-11-23 13:36:30,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302442991] [2021-11-23 13:36:30,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302442991] [2021-11-23 13:36:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302442991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:30,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453144513] [2021-11-23 13:36:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:36:30,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:36:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:36:30,504 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,532 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-11-23 13:36:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:36:30,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:36:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,534 INFO L225 Difference]: With dead ends: 57 [2021-11-23 13:36:30,534 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 13:36:30,534 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 [2021-11-23 13:36:30,535 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 13:36:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 13:36:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-11-23 13:36:30,538 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 16 [2021-11-23 13:36:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-11-23 13:36:30,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-11-23 13:36:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:36:30,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:36:30,540 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312827, now seen corresponding path program 1 times [2021-11-23 13:36:30,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158619607] [2021-11-23 13:36:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158619607] [2021-11-23 13:36:30,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158619607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:36:30,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645678123] [2021-11-23 13:36:30,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:36:30,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:36:30,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:36:30,623 INFO L87 Difference]: Start difference. First operand 57 states and 69 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) [2021-11-23 13:36:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,671 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-23 13:36:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:36:30,672 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 [2021-11-23 13:36:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,673 INFO L225 Difference]: With dead ends: 61 [2021-11-23 13:36:30,673 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:36:30,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:36:30,676 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:36:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-23 13:36:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-23 13:36:30,679 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2021-11-23 13:36:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,679 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-23 13:36:30,680 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) [2021-11-23 13:36:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-23 13:36:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:36:30,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,681 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:36:30,681 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1455987438, now seen corresponding path program 1 times [2021-11-23 13:36:30,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046544393] [2021-11-23 13:36:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046544393] [2021-11-23 13:36:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046544393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:30,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037978880] [2021-11-23 13:36:30,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:36:30,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:36:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:30,714 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,722 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-11-23 13:36:30,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:36:30,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 13:36:30,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,723 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:36:30,723 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 13:36:30,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:30,724 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 13:36:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 13:36:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-23 13:36:30,731 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 20 [2021-11-23 13:36:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,731 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-23 13:36:30,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-23 13:36:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 13:36:30,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:36:30,733 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,734 INFO L85 PathProgramCache]: Analyzing trace with hash 420786095, now seen corresponding path program 1 times [2021-11-23 13:36:30,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95464991] [2021-11-23 13:36:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95464991] [2021-11-23 13:36:30,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95464991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:36:30,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760570712] [2021-11-23 13:36:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:36:30,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:36:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:30,779 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-11-23 13:36:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:30,785 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-11-23 13:36:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:36:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 13:36:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:30,786 INFO L225 Difference]: With dead ends: 58 [2021-11-23 13:36:30,786 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 13:36:30,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:36:30,787 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:30,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:36:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 13:36:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 13:36:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 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) [2021-11-23 13:36:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-11-23 13:36:30,790 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-11-23 13:36:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:30,792 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-11-23 13:36:30,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-11-23 13:36:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-11-23 13:36:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 13:36:30,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:30,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:30,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:36:30,793 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2103285548, now seen corresponding path program 1 times [2021-11-23 13:36:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:30,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783527290] [2021-11-23 13:36:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:30,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:30,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:30,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783527290] [2021-11-23 13:36:30,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783527290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:30,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:30,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 13:36:30,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234580067] [2021-11-23 13:36:30,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:30,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:36:30,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:36:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:36:30,935 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-11-23 13:36:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:31,055 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-23 13:36:31,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:36:31,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 [2021-11-23 13:36:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:31,057 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:36:31,057 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 13:36:31,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:36:31,058 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:31,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 176 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 13:36:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 13:36:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 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) [2021-11-23 13:36:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-11-23 13:36:31,061 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 25 [2021-11-23 13:36:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:31,061 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-11-23 13:36:31,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-11-23 13:36:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-11-23 13:36:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 13:36:31,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:31,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:36:31,063 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 386243414, now seen corresponding path program 1 times [2021-11-23 13:36:31,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733439243] [2021-11-23 13:36:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:31,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:31,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733439243] [2021-11-23 13:36:31,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733439243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:31,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:31,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 13:36:31,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161354048] [2021-11-23 13:36:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:31,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:36:31,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:36:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:36:31,231 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-23 13:36:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:31,377 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-23 13:36:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:36:31,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 [2021-11-23 13:36:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:31,379 INFO L225 Difference]: With dead ends: 81 [2021-11-23 13:36:31,379 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 13:36:31,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:36:31,380 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 110 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:31,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 152 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 13:36:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-11-23 13:36:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:31,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-23 13:36:31,383 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 25 [2021-11-23 13:36:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:31,383 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-23 13:36:31,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-23 13:36:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-23 13:36:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 13:36:31,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:31,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:31,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 13:36:31,384 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash 235047385, now seen corresponding path program 1 times [2021-11-23 13:36:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:31,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789532194] [2021-11-23 13:36:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:31,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:31,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:31,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789532194] [2021-11-23 13:36:31,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789532194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:31,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633827108] [2021-11-23 13:36:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:31,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:31,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:31,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:31,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:36:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:31,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 13:36:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:31,591 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:36:31,592 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 [2021-11-23 13:36:31,598 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 [2021-11-23 13:36:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:32,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633827108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:32,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:32,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-11-23 13:36:32,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381547598] [2021-11-23 13:36:32,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:32,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:36:32,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:36:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:36:32,087 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 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) [2021-11-23 13:36:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:32,346 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-11-23 13:36:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:36:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 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 29 [2021-11-23 13:36:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:32,347 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:36:32,347 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 13:36:32,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:36:32,349 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 305 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:32,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 153 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 13:36:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-11-23 13:36:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-23 13:36:32,352 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 29 [2021-11-23 13:36:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:32,352 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-23 13:36:32,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 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) [2021-11-23 13:36:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-23 13:36:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 13:36:32,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:32,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:32,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:32,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:32,563 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1303465643, now seen corresponding path program 1 times [2021-11-23 13:36:32,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:32,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834580338] [2021-11-23 13:36:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:32,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:32,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834580338] [2021-11-23 13:36:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834580338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:32,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:32,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 13:36:32,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120716650] [2021-11-23 13:36:32,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:32,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:36:32,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:36:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:36:32,721 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:32,953 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-11-23 13:36:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:36:32,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:36:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:32,954 INFO L225 Difference]: With dead ends: 74 [2021-11-23 13:36:32,955 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 13:36:32,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:36:32,956 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:32,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 251 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 13:36:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 13:36:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 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) [2021-11-23 13:36:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-23 13:36:32,958 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 30 [2021-11-23 13:36:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:32,959 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-23 13:36:32,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-23 13:36:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 13:36:32,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:32,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:32,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 13:36:32,960 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:32,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash 619762391, now seen corresponding path program 1 times [2021-11-23 13:36:32,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:32,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569203607] [2021-11-23 13:36:32,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:32,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:33,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:33,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569203607] [2021-11-23 13:36:33,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569203607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:36:33,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:36:33,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-23 13:36:33,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387951915] [2021-11-23 13:36:33,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:36:33,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:36:33,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:36:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:36:33,154 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:33,462 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-11-23 13:36:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 13:36:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:36:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:33,466 INFO L225 Difference]: With dead ends: 70 [2021-11-23 13:36:33,466 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 13:36:33,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:36:33,467 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:33,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 221 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 13:36:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-23 13:36:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.163265306122449) internal successors, (57), 52 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) [2021-11-23 13:36:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-23 13:36:33,470 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30 [2021-11-23 13:36:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:33,470 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-23 13:36:33,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-23 13:36:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 13:36:33,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:33,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:33,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 13:36:33,472 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1945235956, now seen corresponding path program 1 times [2021-11-23 13:36:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:33,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188241306] [2021-11-23 13:36:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:33,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:33,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188241306] [2021-11-23 13:36:33,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188241306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:33,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958315231] [2021-11-23 13:36:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:33,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:33,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:33,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:33,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:36:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 13:36:33,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:33,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:34,012 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 [2021-11-23 13:36:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:34,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958315231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:34,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:34,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-11-23 13:36:34,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057051801] [2021-11-23 13:36:34,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:34,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 13:36:34,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:34,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 13:36:34,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:36:34,054 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:34,208 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-11-23 13:36:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:36:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 13:36:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:34,209 INFO L225 Difference]: With dead ends: 68 [2021-11-23 13:36:34,210 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 13:36:34,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-11-23 13:36:34,211 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 212 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:34,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 134 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 13:36:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-11-23 13:36:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.125) internal successors, (54), 51 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) [2021-11-23 13:36:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-23 13:36:34,213 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 34 [2021-11-23 13:36:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:34,215 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-23 13:36:34,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-23 13:36:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:36:34,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:34,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:34,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:34,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:34,427 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -871868475, now seen corresponding path program 1 times [2021-11-23 13:36:34,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:34,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466595318] [2021-11-23 13:36:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:34,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:34,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466595318] [2021-11-23 13:36:34,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466595318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:34,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681830974] [2021-11-23 13:36:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:34,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:34,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:34,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:36:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 13:36:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:34,909 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 [2021-11-23 13:36:44,658 INFO L354 Elim1Store]: treesize reduction 92, result has 28.7 percent of original size [2021-11-23 13:36:44,659 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 56 treesize of output 59 [2021-11-23 13:36:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:44,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:45,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:36:45,730 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 177 treesize of output 185 [2021-11-23 13:36:45,880 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 13:36:45,880 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 67 treesize of output 61 [2021-11-23 13:36:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:36:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681830974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:46,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:46,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 21] total 47 [2021-11-23 13:36:46,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809086315] [2021-11-23 13:36:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:46,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 13:36:46,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 13:36:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1945, Unknown=4, NotChecked=0, Total=2162 [2021-11-23 13:36:46,162 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:54,161 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2021-11-23 13:36:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 13:36:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 13:36:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:54,163 INFO L225 Difference]: With dead ends: 149 [2021-11-23 13:36:54,163 INFO L226 Difference]: Without dead ends: 66 [2021-11-23 13:36:54,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=493, Invalid=4195, Unknown=4, NotChecked=0, Total=4692 [2021-11-23 13:36:54,166 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:54,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 503 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 207 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-11-23 13:36:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-23 13:36:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-23 13:36:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 59 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) [2021-11-23 13:36:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-23 13:36:54,169 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2021-11-23 13:36:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:54,169 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-23 13:36:54,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-23 13:36:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 13:36:54,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:54,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:54,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:54,387 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1808120587, now seen corresponding path program 2 times [2021-11-23 13:36:54,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016851484] [2021-11-23 13:36:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:54,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:54,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016851484] [2021-11-23 13:36:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016851484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986326483] [2021-11-23 13:36:54,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:36:54,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:54,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:54,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:54,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:36:54,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:36:54,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:36:54,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:36:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:54,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 13:36:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986326483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:55,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:55,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-23 13:36:55,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815407795] [2021-11-23 13:36:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:36:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:36:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:36:55,170 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:55,386 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-11-23 13:36:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:36:55,387 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 13:36:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:55,388 INFO L225 Difference]: With dead ends: 82 [2021-11-23 13:36:55,388 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 13:36:55,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:36:55,389 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 341 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:55,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 194 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 13:36:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-11-23 13:36:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-23 13:36:55,392 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 51 [2021-11-23 13:36:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:55,392 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-23 13:36:55,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.473684210526316) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:55,393 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-23 13:36:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 13:36:55,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:55,393 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:55,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:55,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 13:36:55,603 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash 217163363, now seen corresponding path program 2 times [2021-11-23 13:36:55,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:55,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780028554] [2021-11-23 13:36:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:55,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:55,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780028554] [2021-11-23 13:36:55,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780028554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:55,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082581382] [2021-11-23 13:36:55,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:36:55,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:55,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:55,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:55,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:36:55,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:36:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:36:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:36:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:55,849 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:36:55,850 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 [2021-11-23 13:36:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:56,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:56,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082581382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:56,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:56,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-11-23 13:36:56,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019698358] [2021-11-23 13:36:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:56,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:36:56,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:36:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:36:56,681 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 25 states, 24 states have (on average 5.458333333333333) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:36:56,901 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-11-23 13:36:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:36:56,902 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.458333333333333) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-23 13:36:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:36:56,902 INFO L225 Difference]: With dead ends: 80 [2021-11-23 13:36:56,902 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 13:36:56,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:36:56,904 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 390 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:36:56,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 198 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:36:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 13:36:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-11-23 13:36:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-23 13:36:56,909 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 52 [2021-11-23 13:36:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:36:56,909 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-23 13:36:56,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.458333333333333) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:36:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-23 13:36:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:36:56,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:36:56,911 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:36:56,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:36:57,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 13:36:57,111 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:36:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:36:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1900752950, now seen corresponding path program 3 times [2021-11-23 13:36:57,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:36:57,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345328071] [2021-11-23 13:36:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:36:57,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:36:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:36:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:36:57,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:36:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345328071] [2021-11-23 13:36:57,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345328071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:36:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377241930] [2021-11-23 13:36:57,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:36:57,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:36:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:36:57,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:36:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:36:57,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:36:57,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:36:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 13:36:57,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:36:57,484 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 [2021-11-23 13:36:58,045 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 [2021-11-23 13:36:58,115 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 36 treesize of output 35 [2021-11-23 13:36:59,138 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-23 13:36:59,138 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 42 treesize of output 29 [2021-11-23 13:36:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:36:59,310 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 [2021-11-23 13:36:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:36:59,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377241930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:36:59,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:36:59,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 41 [2021-11-23 13:36:59,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467273635] [2021-11-23 13:36:59,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:36:59,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 13:36:59,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:36:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 13:36:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 13:36:59,979 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 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) [2021-11-23 13:37:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:00,503 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2021-11-23 13:37:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:37:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 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 61 [2021-11-23 13:37:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:00,505 INFO L225 Difference]: With dead ends: 160 [2021-11-23 13:37:00,505 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 13:37:00,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=2210, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 13:37:00,507 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 112 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:00,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 702 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 418 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-11-23 13:37:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 13:37:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-23 13:37:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-11-23 13:37:00,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 61 [2021-11-23 13:37:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-11-23 13:37:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 41 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) [2021-11-23 13:37:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-11-23 13:37:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 13:37:00,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:00,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:00,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 13:37:00,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 13:37:00,731 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1100150215, now seen corresponding path program 4 times [2021-11-23 13:37:00,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:00,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112939392] [2021-11-23 13:37:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:00,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:37:00,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:00,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112939392] [2021-11-23 13:37:00,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112939392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:00,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939592510] [2021-11-23 13:37:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:37:00,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:00,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:37:00,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:37:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:37:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:37:01,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:01,584 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 5 treesize of output 3 [2021-11-23 13:37:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:37:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939592510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:01,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:01,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2021-11-23 13:37:01,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787247784] [2021-11-23 13:37:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:01,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 13:37:01,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 13:37:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:37:01,651 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:01,953 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-11-23 13:37:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:37:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-23 13:37:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:01,954 INFO L225 Difference]: With dead ends: 96 [2021-11-23 13:37:01,954 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 13:37:01,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:37:01,955 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 468 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:01,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 346 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 13:37:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-11-23 13:37:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-23 13:37:01,959 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 65 [2021-11-23 13:37:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:01,959 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-23 13:37:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-23 13:37:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:37:01,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:01,960 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:01,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:02,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 13:37:02,183 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 255081717, now seen corresponding path program 3 times [2021-11-23 13:37:02,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:02,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104364990] [2021-11-23 13:37:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:02,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:02,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104364990] [2021-11-23 13:37:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104364990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029075689] [2021-11-23 13:37:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:37:02,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:02,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:02,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:02,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:37:02,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:37:02,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 13:37:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:03,014 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 [2021-11-23 13:37:03,445 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 13:37:03,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-23 13:37:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:37:03,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:03,692 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 [2021-11-23 13:37:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 13:37:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:03,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029075689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:03,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:03,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 17] total 45 [2021-11-23 13:37:03,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861446958] [2021-11-23 13:37:03,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:03,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 13:37:03,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 13:37:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1813, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:37:03,918 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:04,879 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-11-23 13:37:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 13:37:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-23 13:37:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:04,880 INFO L225 Difference]: With dead ends: 129 [2021-11-23 13:37:04,880 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 13:37:04,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=418, Invalid=3242, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:37:04,882 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 299 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:04,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 780 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 830 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2021-11-23 13:37:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 13:37:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-11-23 13:37:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-23 13:37:04,886 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 66 [2021-11-23 13:37:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:04,886 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-23 13:37:04,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2222222222222223) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-23 13:37:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 13:37:04,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:04,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:04,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:05,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 13:37:05,103 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1806012818, now seen corresponding path program 4 times [2021-11-23 13:37:05,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493426914] [2021-11-23 13:37:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:05,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:05,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493426914] [2021-11-23 13:37:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493426914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408286941] [2021-11-23 13:37:05,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:37:05,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:05,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:37:05,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:37:05,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 13:37:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:05,985 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 [2021-11-23 13:37:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408286941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:06,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-11-23 13:37:06,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742675042] [2021-11-23 13:37:06,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 13:37:06,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 13:37:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-11-23 13:37:06,053 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 25 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:06,381 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-11-23 13:37:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:37:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 25 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-23 13:37:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:06,386 INFO L225 Difference]: With dead ends: 98 [2021-11-23 13:37:06,387 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 13:37:06,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:37:06,388 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 498 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:06,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 350 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 13:37:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-11-23 13:37:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-11-23 13:37:06,390 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 70 [2021-11-23 13:37:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:06,390 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-11-23 13:37:06,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.541666666666667) internal successors, (133), 25 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-11-23 13:37:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 13:37:06,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:06,392 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:06,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-23 13:37:06,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:06,595 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash 810248679, now seen corresponding path program 5 times [2021-11-23 13:37:06,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898936431] [2021-11-23 13:37:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:06,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:06,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898936431] [2021-11-23 13:37:06,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898936431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:06,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895970047] [2021-11-23 13:37:06,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:37:06,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:06,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:06,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:37:06,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 13:37:06,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 13:37:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:37:08,014 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 [2021-11-23 13:37:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:08,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:11,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:37:11,545 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 [2021-11-23 13:37:11,633 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 [2021-11-23 13:37:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:37:11,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895970047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:11,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:11,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 39 [2021-11-23 13:37:11,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691994108] [2021-11-23 13:37:11,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:11,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 13:37:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 13:37:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:37:11,837 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:14,073 INFO L93 Difference]: Finished difference Result 247 states and 252 transitions. [2021-11-23 13:37:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 13:37:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:37:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:14,078 INFO L225 Difference]: With dead ends: 247 [2021-11-23 13:37:14,078 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 13:37:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=302, Invalid=3858, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 13:37:14,080 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:14,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1070 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 622 Invalid, 0 Unknown, 294 Unchecked, 0.3s Time] [2021-11-23 13:37:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 13:37:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-11-23 13:37:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.065217391304348) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-23 13:37:14,084 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 79 [2021-11-23 13:37:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:14,084 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-23 13:37:14,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:14,085 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-23 13:37:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 13:37:14,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:14,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:14,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:14,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:14,299 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 136208941, now seen corresponding path program 6 times [2021-11-23 13:37:14,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:14,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984351624] [2021-11-23 13:37:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:14,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:14,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984351624] [2021-11-23 13:37:14,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984351624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:14,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746308159] [2021-11-23 13:37:14,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:37:14,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:14,495 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:14,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:37:14,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 13:37:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 13:37:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:15,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 13:37:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746308159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:15,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-11-23 13:37:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883730104] [2021-11-23 13:37:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 13:37:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 13:37:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-11-23 13:37:15,460 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 32 states, 31 states have (on average 6.225806451612903) internal successors, (193), 32 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:15,851 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-11-23 13:37:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:37:15,852 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.225806451612903) internal successors, (193), 32 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-23 13:37:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:15,853 INFO L225 Difference]: With dead ends: 118 [2021-11-23 13:37:15,853 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 13:37:15,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 13:37:15,855 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 598 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:15,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 464 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 13:37:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-11-23 13:37:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 106 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-11-23 13:37:15,859 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 87 [2021-11-23 13:37:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:15,860 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-11-23 13:37:15,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.225806451612903) internal successors, (193), 32 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-11-23 13:37:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 13:37:15,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:15,861 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:15,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:16,071 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:16,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:16,071 INFO L85 PathProgramCache]: Analyzing trace with hash -72490111, now seen corresponding path program 5 times [2021-11-23 13:37:16,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223441912] [2021-11-23 13:37:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:16,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:16,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:16,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223441912] [2021-11-23 13:37:16,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223441912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976105536] [2021-11-23 13:37:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:37:16,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:16,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:16,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:37:16,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 13:37:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:16,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 13:37:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:16,464 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:37:16,464 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 [2021-11-23 13:37:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:16,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976105536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:17,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:17,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-11-23 13:37:17,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273515805] [2021-11-23 13:37:17,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:17,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 13:37:17,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 13:37:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-11-23 13:37:17,613 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 30 states, 29 states have (on average 6.724137931034483) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:17,920 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-11-23 13:37:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:37:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 6.724137931034483) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:37:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:17,921 INFO L225 Difference]: With dead ends: 116 [2021-11-23 13:37:17,921 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 13:37:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:37:17,922 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 559 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:17,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 351 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 13:37:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-11-23 13:37:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-23 13:37:17,926 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 88 [2021-11-23 13:37:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:17,926 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-23 13:37:17,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 6.724137931034483) internal successors, (195), 30 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-23 13:37:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 13:37:17,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:17,927 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:17,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:18,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:18,143 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1990120664, now seen corresponding path program 7 times [2021-11-23 13:37:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074011565] [2021-11-23 13:37:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:18,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:18,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074011565] [2021-11-23 13:37:18,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074011565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077919161] [2021-11-23 13:37:18,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:37:18,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:18,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:18,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:18,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:37:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:18,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 13:37:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:18,838 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 [2021-11-23 13:37:19,964 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 [2021-11-23 13:37:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:19,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:20,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:37:20,798 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 [2021-11-23 13:37:20,878 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 [2021-11-23 13:37:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:21,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077919161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:21,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:21,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 44 [2021-11-23 13:37:21,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316551127] [2021-11-23 13:37:21,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:21,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 13:37:21,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 13:37:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1778, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 13:37:21,084 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 44 states, 44 states have (on average 4.840909090909091) internal successors, (213), 44 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) [2021-11-23 13:37:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:23,880 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2021-11-23 13:37:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 13:37:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.840909090909091) internal successors, (213), 44 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 97 [2021-11-23 13:37:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:23,882 INFO L225 Difference]: With dead ends: 299 [2021-11-23 13:37:23,882 INFO L226 Difference]: Without dead ends: 120 [2021-11-23 13:37:23,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=348, Invalid=5202, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 13:37:23,885 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 108 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:23,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1464 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 858 Invalid, 0 Unknown, 549 Unchecked, 0.4s Time] [2021-11-23 13:37:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-23 13:37:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-11-23 13:37:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.0545454545454545) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-11-23 13:37:23,889 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 97 [2021-11-23 13:37:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-11-23 13:37:23,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.840909090909091) internal successors, (213), 44 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) [2021-11-23 13:37:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-11-23 13:37:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-23 13:37:23,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:23,891 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:23,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:24,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 13:37:24,115 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2118244450, now seen corresponding path program 8 times [2021-11-23 13:37:24,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665327869] [2021-11-23 13:37:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:24,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665327869] [2021-11-23 13:37:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665327869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330800536] [2021-11-23 13:37:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:37:24,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:24,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:24,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:37:24,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:37:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 13:37:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:24,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:25,253 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 [2021-11-23 13:37:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330800536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:25,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:25,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-11-23 13:37:25,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226983695] [2021-11-23 13:37:25,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:25,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 13:37:25,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 13:37:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-11-23 13:37:25,364 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:25,885 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-11-23 13:37:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:37:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:37:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:25,886 INFO L225 Difference]: With dead ends: 136 [2021-11-23 13:37:25,886 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 13:37:25,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 13:37:25,887 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 580 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:25,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 634 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:37:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 13:37:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2021-11-23 13:37:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0578512396694215) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-11-23 13:37:25,892 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 105 [2021-11-23 13:37:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:25,892 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-11-23 13:37:25,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-11-23 13:37:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 13:37:25,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:25,894 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:25,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:26,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 13:37:26,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1241068496, now seen corresponding path program 6 times [2021-11-23 13:37:26,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159876129] [2021-11-23 13:37:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:26,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:26,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159876129] [2021-11-23 13:37:26,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159876129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732502347] [2021-11-23 13:37:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:37:26,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:26,365 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:26,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:37:26,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-23 13:37:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 13:37:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:26,573 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:37:26,574 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 [2021-11-23 13:37:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 154 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 13:37:27,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:28,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732502347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:28,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:28,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 38 [2021-11-23 13:37:28,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490182443] [2021-11-23 13:37:28,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:28,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 13:37:28,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 13:37:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 13:37:28,212 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 39 states, 38 states have (on average 6.552631578947368) internal successors, (249), 39 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:28,673 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-11-23 13:37:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 13:37:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.552631578947368) internal successors, (249), 39 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:37:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:28,674 INFO L225 Difference]: With dead ends: 134 [2021-11-23 13:37:28,674 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 13:37:28,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=1733, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:37:28,676 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 579 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:28,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 454 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:37:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 13:37:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-11-23 13:37:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.05) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-11-23 13:37:28,680 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 106 [2021-11-23 13:37:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:28,681 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-11-23 13:37:28,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.552631578947368) internal successors, (249), 39 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-11-23 13:37:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 13:37:28,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:28,683 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:28,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:28,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 13:37:28,887 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1811890441, now seen corresponding path program 9 times [2021-11-23 13:37:28,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011795722] [2021-11-23 13:37:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:28,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:29,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:29,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011795722] [2021-11-23 13:37:29,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011795722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538299016] [2021-11-23 13:37:29,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:37:29,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:29,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:29,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:29,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:37:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 13:37:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 13:37:29,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:29,871 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 [2021-11-23 13:37:30,991 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 [2021-11-23 13:37:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:31,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:33,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:37:33,806 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 [2021-11-23 13:37:33,873 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 [2021-11-23 13:37:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:37:34,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538299016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:34,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:34,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 49 [2021-11-23 13:37:34,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146999685] [2021-11-23 13:37:34,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:34,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 13:37:34,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 13:37:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2226, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:37:34,103 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 49 states, 49 states have (on average 5.122448979591836) internal successors, (251), 49 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) [2021-11-23 13:37:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:36,176 INFO L93 Difference]: Finished difference Result 351 states and 356 transitions. [2021-11-23 13:37:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-23 13:37:36,176 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.122448979591836) internal successors, (251), 49 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 115 [2021-11-23 13:37:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:36,177 INFO L225 Difference]: With dead ends: 351 [2021-11-23 13:37:36,177 INFO L226 Difference]: Without dead ends: 138 [2021-11-23 13:37:36,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 199 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=378, Invalid=6428, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 13:37:36,179 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 103 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 646 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:36,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 1846 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1096 Invalid, 0 Unknown, 646 Unchecked, 0.5s Time] [2021-11-23 13:37:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-23 13:37:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-23 13:37:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.046875) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-11-23 13:37:36,183 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 115 [2021-11-23 13:37:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:36,184 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-11-23 13:37:36,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.122448979591836) internal successors, (251), 49 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) [2021-11-23 13:37:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-11-23 13:37:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 13:37:36,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:36,185 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:36,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:36,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 13:37:36,386 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:36,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash 740380239, now seen corresponding path program 10 times [2021-11-23 13:37:36,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:36,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148838269] [2021-11-23 13:37:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:36,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:36,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148838269] [2021-11-23 13:37:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148838269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527665104] [2021-11-23 13:37:36,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:37:36,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:36,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:36,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:37:36,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:37:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 13:37:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 45 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:37,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:37,765 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 [2021-11-23 13:37:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 45 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:37,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527665104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:37,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:37,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-11-23 13:37:37,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492519537] [2021-11-23 13:37:37,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:37,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:37:37,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:37:37,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:37:37,889 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:38,395 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-11-23 13:37:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:37:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-23 13:37:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:38,407 INFO L225 Difference]: With dead ends: 154 [2021-11-23 13:37:38,407 INFO L226 Difference]: Without dead ends: 154 [2021-11-23 13:37:38,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:37:38,408 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 559 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:38,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 713 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:37:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-23 13:37:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2021-11-23 13:37:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 142 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2021-11-23 13:37:38,412 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 123 [2021-11-23 13:37:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:38,412 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2021-11-23 13:37:38,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 6.171428571428572) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2021-11-23 13:37:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 13:37:38,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:38,414 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:38,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:38,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 13:37:38,634 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:38,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1476950943, now seen corresponding path program 7 times [2021-11-23 13:37:38,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:38,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92753068] [2021-11-23 13:37:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:38,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:38,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92753068] [2021-11-23 13:37:38,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92753068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205006818] [2021-11-23 13:37:38,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:37:38,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:38,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:38,899 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:38,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:37:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 13:37:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:39,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:39,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 13:37:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:39,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205006818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:39,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:39,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2021-11-23 13:37:39,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584566924] [2021-11-23 13:37:39,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:39,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:37:39,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:37:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:37:39,946 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:40,405 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2021-11-23 13:37:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:37:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have 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 [2021-11-23 13:37:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:40,407 INFO L225 Difference]: With dead ends: 152 [2021-11-23 13:37:40,407 INFO L226 Difference]: Without dead ends: 148 [2021-11-23 13:37:40,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:37:40,407 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 800 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:40,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 687 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:37:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-23 13:37:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2021-11-23 13:37:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-11-23 13:37:40,411 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 124 [2021-11-23 13:37:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:40,412 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-11-23 13:37:40,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 6.027777777777778) internal successors, (217), 37 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-11-23 13:37:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 13:37:40,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:40,414 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:40,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:40,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 13:37:40,627 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1689616774, now seen corresponding path program 11 times [2021-11-23 13:37:40,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823196798] [2021-11-23 13:37:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:40,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:41,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:41,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823196798] [2021-11-23 13:37:41,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823196798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:41,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676087641] [2021-11-23 13:37:41,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:37:41,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:41,099 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:41,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:37:41,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 13:37:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:41,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 13:37:41,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:41,561 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 [2021-11-23 13:37:42,877 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 [2021-11-23 13:37:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:42,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:44,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:37:44,052 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 [2021-11-23 13:37:44,140 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 [2021-11-23 13:37:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:37:44,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676087641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:44,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:44,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 54 [2021-11-23 13:37:44,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867530845] [2021-11-23 13:37:44,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:44,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 13:37:44,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 13:37:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2724, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 13:37:44,380 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:47,549 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-11-23 13:37:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-23 13:37:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 13:37:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:47,550 INFO L225 Difference]: With dead ends: 403 [2021-11-23 13:37:47,551 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 13:37:47,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 232 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=413, Invalid=7959, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 13:37:47,552 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 105 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:47,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 2353 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1451 Invalid, 0 Unknown, 566 Unchecked, 0.6s Time] [2021-11-23 13:37:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 13:37:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-11-23 13:37:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0410958904109588) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-11-23 13:37:47,557 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 133 [2021-11-23 13:37:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:47,557 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-11-23 13:37:47,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-11-23 13:37:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-23 13:37:47,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:47,559 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:47,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:47,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:47,783 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1890736576, now seen corresponding path program 12 times [2021-11-23 13:37:47,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:47,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424724019] [2021-11-23 13:37:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:47,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 45 proven. 277 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:48,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424724019] [2021-11-23 13:37:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424724019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190087140] [2021-11-23 13:37:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:37:48,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:48,099 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:48,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 13:37:48,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-23 13:37:48,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 13:37:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:49,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 13:37:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:49,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190087140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:49,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:49,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2021-11-23 13:37:49,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160230121] [2021-11-23 13:37:49,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:49,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 13:37:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 13:37:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:37:49,900 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 47 states, 46 states have (on average 6.673913043478261) internal successors, (307), 47 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:50,372 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-11-23 13:37:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:37:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 6.673913043478261) internal successors, (307), 47 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-23 13:37:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:50,374 INFO L225 Difference]: With dead ends: 172 [2021-11-23 13:37:50,374 INFO L226 Difference]: Without dead ends: 172 [2021-11-23 13:37:50,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 13:37:50,375 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 806 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:50,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 547 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:37:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-23 13:37:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2021-11-23 13:37:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 160 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2021-11-23 13:37:50,380 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 141 [2021-11-23 13:37:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:50,380 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2021-11-23 13:37:50,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 6.673913043478261) internal successors, (307), 47 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2021-11-23 13:37:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 13:37:50,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:50,390 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:50,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:50,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:50,615 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1516708302, now seen corresponding path program 8 times [2021-11-23 13:37:50,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:50,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758102813] [2021-11-23 13:37:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:50,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:50,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758102813] [2021-11-23 13:37:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758102813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876139541] [2021-11-23 13:37:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:37:50,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:50,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:50,999 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:51,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 13:37:51,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:37:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 13:37:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:51,143 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:37:51,143 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 [2021-11-23 13:37:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:52,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 91 proven. 238 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876139541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:53,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:53,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2021-11-23 13:37:53,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280445894] [2021-11-23 13:37:53,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 13:37:53,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 13:37:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 13:37:53,204 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:53,795 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-11-23 13:37:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:37:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-23 13:37:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:53,797 INFO L225 Difference]: With dead ends: 170 [2021-11-23 13:37:53,797 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 13:37:53,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=762, Invalid=3398, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 13:37:53,799 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 675 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:53,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 914 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:37:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 13:37:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-23 13:37:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-11-23 13:37:53,803 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 142 [2021-11-23 13:37:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:53,804 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-11-23 13:37:53,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-11-23 13:37:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 13:37:53,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:53,806 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:53,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:54,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:54,022 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:37:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash -612213461, now seen corresponding path program 13 times [2021-11-23 13:37:54,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:54,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028511204] [2021-11-23 13:37:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:54,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:54,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:54,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028511204] [2021-11-23 13:37:54,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028511204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:37:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528480420] [2021-11-23 13:37:54,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:37:54,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:54,524 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 13:37:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:54,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-23 13:37:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:55,025 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 [2021-11-23 13:37:56,535 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 [2021-11-23 13:37:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:56,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:57,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:37:57,787 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 [2021-11-23 13:37:57,848 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 [2021-11-23 13:37:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-23 13:37:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528480420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:58,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:37:58,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 59 [2021-11-23 13:37:58,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569296780] [2021-11-23 13:37:58,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:58,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 13:37:58,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 13:37:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3272, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 13:37:58,112 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:01,711 INFO L93 Difference]: Finished difference Result 455 states and 460 transitions. [2021-11-23 13:38:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-23 13:38:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-23 13:38:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:01,713 INFO L225 Difference]: With dead ends: 455 [2021-11-23 13:38:01,714 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 13:38:01,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 265 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=456, Invalid=9846, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 13:38:01,716 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 127 mSDsluCounter, 2872 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 833 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:01,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2945 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1646 Invalid, 0 Unknown, 833 Unchecked, 0.6s Time] [2021-11-23 13:38:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 13:38:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2021-11-23 13:38:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0365853658536586) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-11-23 13:38:01,721 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 151 [2021-11-23 13:38:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:01,721 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-11-23 13:38:01,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-11-23 13:38:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 13:38:01,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:01,723 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:01,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:01,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:01,938 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash 91029361, now seen corresponding path program 14 times [2021-11-23 13:38:01,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533832283] [2021-11-23 13:38:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:02,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:02,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533832283] [2021-11-23 13:38:02,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533832283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:02,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681158869] [2021-11-23 13:38:02,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:38:02,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:02,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:02,328 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:02,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 13:38:02,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:38:02,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:02,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 13:38:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:03,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:03,721 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 [2021-11-23 13:38:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681158869] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:03,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:03,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-11-23 13:38:03,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024573432] [2021-11-23 13:38:03,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:03,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 13:38:03,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 13:38:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 13:38:03,855 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:04,499 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-11-23 13:38:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:38:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-11-23 13:38:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:04,500 INFO L225 Difference]: With dead ends: 190 [2021-11-23 13:38:04,500 INFO L226 Difference]: Without dead ends: 190 [2021-11-23 13:38:04,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 13:38:04,501 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 879 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:04,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 912 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:38:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-23 13:38:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-11-23 13:38:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.04) internal successors, (182), 178 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2021-11-23 13:38:04,505 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 159 [2021-11-23 13:38:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:04,506 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2021-11-23 13:38:04,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2021-11-23 13:38:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:38:04,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:04,507 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:04,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:04,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-23 13:38:04,723 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1473057091, now seen corresponding path program 9 times [2021-11-23 13:38:04,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:04,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762161593] [2021-11-23 13:38:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:04,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:05,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:05,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762161593] [2021-11-23 13:38:05,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762161593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:05,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560912803] [2021-11-23 13:38:05,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:38:05,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:05,132 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:05,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 13:38:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 13:38:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 13:38:05,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:05,819 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:38:05,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:38:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560912803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:08,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:08,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2021-11-23 13:38:08,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702537666] [2021-11-23 13:38:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:08,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 13:38:08,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:08,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 13:38:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=3229, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 13:38:08,361 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 62 states, 61 states have (on average 6.360655737704918) internal successors, (388), 62 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:09,034 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-11-23 13:38:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:38:09,034 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 6.360655737704918) internal successors, (388), 62 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-23 13:38:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:09,035 INFO L225 Difference]: With dead ends: 188 [2021-11-23 13:38:09,035 INFO L226 Difference]: Without dead ends: 184 [2021-11-23 13:38:09,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1039, Invalid=4217, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 13:38:09,036 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 963 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:09,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 730 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:38:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-23 13:38:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2021-11-23 13:38:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0344827586206897) internal successors, (180), 177 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2021-11-23 13:38:09,040 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 160 [2021-11-23 13:38:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:09,040 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2021-11-23 13:38:09,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 6.360655737704918) internal successors, (388), 62 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2021-11-23 13:38:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 13:38:09,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:09,041 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:09,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:09,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-23 13:38:09,242 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:09,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2026679580, now seen corresponding path program 15 times [2021-11-23 13:38:09,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:09,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541087240] [2021-11-23 13:38:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:09,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:09,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541087240] [2021-11-23 13:38:09,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541087240] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:09,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020886403] [2021-11-23 13:38:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:38:09,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:09,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:09,788 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:09,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 13:38:10,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-23 13:38:10,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:10,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 13:38:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:10,517 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 [2021-11-23 13:38:11,224 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 [2021-11-23 13:38:11,279 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 13:38:11,279 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 [2021-11-23 13:38:13,298 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 13:38:13,298 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 [2021-11-23 13:38:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:13,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:14,269 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| 8)) 0)) is different from false [2021-11-23 13:38:14,274 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 [2021-11-23 13:38:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:14,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020886403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:14,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:14,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 61 [2021-11-23 13:38:14,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635879553] [2021-11-23 13:38:14,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:14,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 13:38:14,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 13:38:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3364, Unknown=1, NotChecked=116, Total=3660 [2021-11-23 13:38:14,902 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 61 states, 61 states have (on average 5.360655737704918) internal successors, (327), 61 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:16,641 INFO L93 Difference]: Finished difference Result 313 states and 316 transitions. [2021-11-23 13:38:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:38:16,642 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.360655737704918) internal successors, (327), 61 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-23 13:38:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:16,643 INFO L225 Difference]: With dead ends: 313 [2021-11-23 13:38:16,643 INFO L226 Difference]: Without dead ends: 185 [2021-11-23 13:38:16,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=278, Invalid=4980, Unknown=2, NotChecked=142, Total=5402 [2021-11-23 13:38:16,645 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3089 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:16,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 3089 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1048 Invalid, 0 Unknown, 408 Unchecked, 0.4s Time] [2021-11-23 13:38:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-23 13:38:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-23 13:38:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 181 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2021-11-23 13:38:16,650 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 169 [2021-11-23 13:38:16,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2021-11-23 13:38:16,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.360655737704918) internal successors, (327), 61 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2021-11-23 13:38:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 13:38:16,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:16,653 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:16,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:16,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:16,867 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash -580634977, now seen corresponding path program 16 times [2021-11-23 13:38:16,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:16,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208799981] [2021-11-23 13:38:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:16,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:17,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:17,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208799981] [2021-11-23 13:38:17,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208799981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:17,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128706029] [2021-11-23 13:38:17,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:38:17,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:17,292 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:17,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 13:38:17,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:38:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:17,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 13:38:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:18,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:18,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 13:38:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-23 13:38:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128706029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:19,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:19,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-11-23 13:38:19,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987970658] [2021-11-23 13:38:19,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:19,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 13:38:19,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 13:38:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 13:38:19,088 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 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) [2021-11-23 13:38:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:19,888 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-11-23 13:38:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:38:19,889 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 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 173 [2021-11-23 13:38:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:19,890 INFO L225 Difference]: With dead ends: 204 [2021-11-23 13:38:19,890 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 13:38:19,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:38:19,891 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1080 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:19,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1191 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:38:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 13:38:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 193. [2021-11-23 13:38:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.037037037037037) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-11-23 13:38:19,896 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 173 [2021-11-23 13:38:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:19,897 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-11-23 13:38:19,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 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) [2021-11-23 13:38:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-11-23 13:38:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 13:38:19,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:19,899 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:19,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:20,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-23 13:38:20,115 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -819815089, now seen corresponding path program 10 times [2021-11-23 13:38:20,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304645755] [2021-11-23 13:38:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:20,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 36 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:38:21,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304645755] [2021-11-23 13:38:21,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304645755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841298192] [2021-11-23 13:38:21,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:38:21,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:21,191 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:21,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 13:38:21,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:38:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 13:38:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:21,448 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:38:21,449 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 [2021-11-23 13:38:22,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 13:38:23,180 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 28 [2021-11-23 13:38:23,667 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-23 13:38:23,667 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 39 treesize of output 24 [2021-11-23 13:38:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 348 proven. 168 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:23,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:26,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:38:26,393 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 97 treesize of output 97 [2021-11-23 13:38:26,411 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 [2021-11-23 13:38:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 288 proven. 228 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:28,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841298192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:28,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:28,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 30, 30] total 89 [2021-11-23 13:38:28,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204015500] [2021-11-23 13:38:28,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:28,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-23 13:38:28,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-23 13:38:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=7302, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 13:38:28,061 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 89 states, 89 states have (on average 4.887640449438202) internal successors, (435), 89 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:32,585 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2021-11-23 13:38:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 13:38:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 4.887640449438202) internal successors, (435), 89 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-23 13:38:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:32,586 INFO L225 Difference]: With dead ends: 297 [2021-11-23 13:38:32,586 INFO L226 Difference]: Without dead ends: 203 [2021-11-23 13:38:32,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4145 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1778, Invalid=16582, Unknown=0, NotChecked=0, Total=18360 [2021-11-23 13:38:32,589 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 866 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 3783 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 4505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:32,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 2787 Invalid, 4505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3783 Invalid, 0 Unknown, 595 Unchecked, 1.6s Time] [2021-11-23 13:38:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-23 13:38:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2021-11-23 13:38:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 196 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2021-11-23 13:38:32,593 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 174 [2021-11-23 13:38:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:32,594 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2021-11-23 13:38:32,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 4.887640449438202) internal successors, (435), 89 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2021-11-23 13:38:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 13:38:32,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:32,595 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:32,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-23 13:38:32,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:32,815 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:32,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash 366482028, now seen corresponding path program 11 times [2021-11-23 13:38:32,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:32,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649823997] [2021-11-23 13:38:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:32,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 91 proven. 458 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:33,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:33,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649823997] [2021-11-23 13:38:33,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649823997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251777140] [2021-11-23 13:38:33,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:38:33,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:33,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:33,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:33,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 13:38:33,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 13:38:33,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 13:38:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:33,833 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:38:33,834 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 [2021-11-23 13:38:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 28 proven. 608 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 13:38:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 153 proven. 396 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251777140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:36,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:36,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 22] total 59 [2021-11-23 13:38:36,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040011657] [2021-11-23 13:38:36,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:36,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 13:38:36,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 13:38:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3125, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 13:38:36,482 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 60 states, 59 states have (on average 6.88135593220339) internal successors, (406), 60 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:37,487 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2021-11-23 13:38:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:38:37,488 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 6.88135593220339) internal successors, (406), 60 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-11-23 13:38:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:37,489 INFO L225 Difference]: With dead ends: 206 [2021-11-23 13:38:37,489 INFO L226 Difference]: Without dead ends: 202 [2021-11-23 13:38:37,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=799, Invalid=4313, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 13:38:37,490 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1042 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:37,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 1839 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:38:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-23 13:38:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-11-23 13:38:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.03125) internal successors, (198), 195 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) [2021-11-23 13:38:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-11-23 13:38:37,495 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 178 [2021-11-23 13:38:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:37,496 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-11-23 13:38:37,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 6.88135593220339) internal successors, (406), 60 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-11-23 13:38:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 13:38:37,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:37,497 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:37,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:37,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-23 13:38:37,719 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1653391795, now seen corresponding path program 17 times [2021-11-23 13:38:37,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972076004] [2021-11-23 13:38:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:37,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:38,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:38,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972076004] [2021-11-23 13:38:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972076004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:38,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173000606] [2021-11-23 13:38:38,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:38:38,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:38,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:38,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 13:38:38,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 13:38:38,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:38,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-23 13:38:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:39,201 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 [2021-11-23 13:38:41,161 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 [2021-11-23 13:38:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:41,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:42,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:38:42,852 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 [2021-11-23 13:38:42,908 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 36 treesize of output 32 [2021-11-23 13:38:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 13:38:43,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173000606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:43,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:43,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 31] total 69 [2021-11-23 13:38:43,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786418791] [2021-11-23 13:38:43,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:43,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 13:38:43,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 13:38:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4518, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 13:38:43,204 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 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) [2021-11-23 13:38:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:46,970 INFO L93 Difference]: Finished difference Result 559 states and 564 transitions. [2021-11-23 13:38:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-23 13:38:46,970 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 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 187 [2021-11-23 13:38:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:46,972 INFO L225 Difference]: With dead ends: 559 [2021-11-23 13:38:46,972 INFO L226 Difference]: Without dead ends: 210 [2021-11-23 13:38:46,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 331 SyntacticMatches, 14 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=524, Invalid=13518, Unknown=0, NotChecked=0, Total=14042 [2021-11-23 13:38:46,974 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 126 mSDsluCounter, 4279 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 4368 SdHoareTripleChecker+Invalid, 3758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1078 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:46,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 4368 Invalid, 3758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2638 Invalid, 0 Unknown, 1078 Unchecked, 1.0s Time] [2021-11-23 13:38:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-23 13:38:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-23 13:38:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.03) internal successors, (206), 203 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2021-11-23 13:38:46,979 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 187 [2021-11-23 13:38:46,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:46,979 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2021-11-23 13:38:46,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.840579710144928) internal successors, (403), 69 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) [2021-11-23 13:38:46,980 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2021-11-23 13:38:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 13:38:46,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:46,981 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:47,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:47,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 13:38:47,194 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:47,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash -471861869, now seen corresponding path program 18 times [2021-11-23 13:38:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430853425] [2021-11-23 13:38:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:47,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:38:47,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430853425] [2021-11-23 13:38:47,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430853425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766898134] [2021-11-23 13:38:47,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:38:47,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:47,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:47,670 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:47,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 13:38:49,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-23 13:38:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 13:38:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:49,804 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:38:49,805 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 [2021-11-23 13:38:49,808 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 [2021-11-23 13:38:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 153 proven. 517 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:38:51,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:38:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 190 proven. 480 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:38:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766898134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:38:53,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:38:53,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2021-11-23 13:38:53,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250483121] [2021-11-23 13:38:53,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:38:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-23 13:38:53,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:38:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-23 13:38:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4379, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 13:38:53,134 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:54,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:38:54,508 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-11-23 13:38:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 13:38:54,509 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-23 13:38:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:38:54,510 INFO L225 Difference]: With dead ends: 226 [2021-11-23 13:38:54,511 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 13:38:54,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1561, Invalid=7181, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 13:38:54,511 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1674 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:38:54,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1674 Valid, 1157 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:38:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 13:38:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-11-23 13:38:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.033175355450237) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2021-11-23 13:38:54,516 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 195 [2021-11-23 13:38:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:38:54,517 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2021-11-23 13:38:54,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 6.7) internal successors, (469), 71 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:38:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2021-11-23 13:38:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 13:38:54,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:38:54,519 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:38:54,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 13:38:54,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:54,747 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:38:54,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:38:54,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1742816037, now seen corresponding path program 12 times [2021-11-23 13:38:54,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:38:54,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963953865] [2021-11-23 13:38:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:38:54,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:38:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:38:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 120 proven. 560 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:38:55,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:38:55,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963953865] [2021-11-23 13:38:55,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963953865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:38:55,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128890670] [2021-11-23 13:38:55,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:38:55,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:38:55,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:38:55,311 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:38:55,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 13:38:56,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-23 13:38:56,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:38:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 13:38:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:38:56,919 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:38:56,919 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 [2021-11-23 13:38:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 153 proven. 527 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:38:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 190 proven. 490 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:39:00,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128890670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:00,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:00,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2021-11-23 13:39:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721510902] [2021-11-23 13:39:00,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:00,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 13:39:00,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 13:39:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=4623, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:39:00,066 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 74 states, 73 states have (on average 6.465753424657534) internal successors, (472), 74 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:00,935 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2021-11-23 13:39:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:39:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 6.465753424657534) internal successors, (472), 74 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-23 13:39:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:00,937 INFO L225 Difference]: With dead ends: 224 [2021-11-23 13:39:00,937 INFO L226 Difference]: Without dead ends: 220 [2021-11-23 13:39:00,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1459, Invalid=6023, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 13:39:00,938 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1324 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:00,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 999 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:39:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-23 13:39:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2021-11-23 13:39:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.0285714285714285) internal successors, (216), 213 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2021-11-23 13:39:00,942 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 196 [2021-11-23 13:39:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:00,943 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2021-11-23 13:39:00,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 6.465753424657534) internal successors, (472), 74 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2021-11-23 13:39:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 13:39:00,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:00,945 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:00,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-23 13:39:01,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:01,165 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash -85729090, now seen corresponding path program 19 times [2021-11-23 13:39:01,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027073210] [2021-11-23 13:39:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:01,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:39:01,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027073210] [2021-11-23 13:39:01,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027073210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716848596] [2021-11-23 13:39:01,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:39:01,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:01,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:01,941 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:01,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 13:39:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:02,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-23 13:39:02,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:02,655 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 [2021-11-23 13:39:04,605 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 [2021-11-23 13:39:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:39:04,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:12,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:39:12,952 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 [2021-11-23 13:39:13,004 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 [2021-11-23 13:39:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 13:39:13,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716848596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:13,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:13,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 33] total 74 [2021-11-23 13:39:13,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992345641] [2021-11-23 13:39:13,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:13,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 13:39:13,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 13:39:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5216, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:39:13,323 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:18,399 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2021-11-23 13:39:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-23 13:39:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-23 13:39:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:18,401 INFO L225 Difference]: With dead ends: 611 [2021-11-23 13:39:18,401 INFO L226 Difference]: Without dead ends: 228 [2021-11-23 13:39:18,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 364 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=561, Invalid=15695, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 13:39:18,402 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 148 mSDsluCounter, 4817 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4914 SdHoareTripleChecker+Invalid, 4194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1444 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:18,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4914 Invalid, 4194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2702 Invalid, 0 Unknown, 1444 Unchecked, 1.0s Time] [2021-11-23 13:39:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-23 13:39:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2021-11-23 13:39:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.0275229357798166) internal successors, (224), 221 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-11-23 13:39:18,407 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 205 [2021-11-23 13:39:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:18,407 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-11-23 13:39:18,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-11-23 13:39:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 13:39:18,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:18,409 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:18,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:18,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-23 13:39:18,623 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1278947972, now seen corresponding path program 20 times [2021-11-23 13:39:18,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286855140] [2021-11-23 13:39:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:18,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 153 proven. 661 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:19,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286855140] [2021-11-23 13:39:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286855140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:19,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881321828] [2021-11-23 13:39:19,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:19,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:19,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:19,117 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:19,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 13:39:19,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:19,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 13:39:19,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 190 proven. 624 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:20,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:20,982 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 [2021-11-23 13:39:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 190 proven. 624 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881321828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:21,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:21,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2021-11-23 13:39:21,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154241382] [2021-11-23 13:39:21,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:21,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 13:39:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:21,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 13:39:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 13:39:21,153 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 56 states, 55 states have (on average 6.472727272727273) internal successors, (356), 56 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:22,184 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-11-23 13:39:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:39:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 6.472727272727273) internal successors, (356), 56 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-23 13:39:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:22,186 INFO L225 Difference]: With dead ends: 244 [2021-11-23 13:39:22,186 INFO L226 Difference]: Without dead ends: 244 [2021-11-23 13:39:22,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=927, Invalid=4043, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 13:39:22,187 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1231 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:22,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 1668 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:39:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-23 13:39:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 233. [2021-11-23 13:39:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.0305676855895196) internal successors, (236), 232 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) [2021-11-23 13:39:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2021-11-23 13:39:22,192 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 213 [2021-11-23 13:39:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:22,201 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2021-11-23 13:39:22,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 6.472727272727273) internal successors, (356), 56 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2021-11-23 13:39:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 13:39:22,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:22,203 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:22,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:22,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:22,430 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:22,431 INFO L85 PathProgramCache]: Analyzing trace with hash 992681482, now seen corresponding path program 13 times [2021-11-23 13:39:22,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:22,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032024899] [2021-11-23 13:39:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:22,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 153 proven. 672 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:23,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032024899] [2021-11-23 13:39:23,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032024899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825044252] [2021-11-23 13:39:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:39:23,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:23,036 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:23,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 13:39:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 13:39:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 190 proven. 635 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:24,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:24,990 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 [2021-11-23 13:39:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 190 proven. 635 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:25,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825044252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:25,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:25,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2021-11-23 13:39:25,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762436060] [2021-11-23 13:39:25,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:25,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 13:39:25,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 13:39:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:39:25,132 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:26,153 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2021-11-23 13:39:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 13:39:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-11-23 13:39:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:26,155 INFO L225 Difference]: With dead ends: 242 [2021-11-23 13:39:26,155 INFO L226 Difference]: Without dead ends: 238 [2021-11-23 13:39:26,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=919, Invalid=4051, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 13:39:26,155 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1863 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:26,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1863 Valid, 1666 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:39:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-23 13:39:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2021-11-23 13:39:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 228 states have (on average 1.0263157894736843) internal successors, (234), 231 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) [2021-11-23 13:39:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2021-11-23 13:39:26,160 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 214 [2021-11-23 13:39:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:26,160 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2021-11-23 13:39:26,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 6.375) internal successors, (357), 57 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2021-11-23 13:39:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-23 13:39:26,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:26,163 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:26,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:26,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:26,363 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1297062801, now seen corresponding path program 21 times [2021-11-23 13:39:26,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:26,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195635691] [2021-11-23 13:39:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:26,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:27,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195635691] [2021-11-23 13:39:27,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195635691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866821974] [2021-11-23 13:39:27,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:39:27,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:27,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:27,162 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:27,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 13:39:30,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 13:39:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-23 13:39:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:30,175 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 [2021-11-23 13:39:31,037 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 [2021-11-23 13:39:31,103 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-23 13:39:31,103 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 [2021-11-23 13:39:33,769 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-23 13:39:33,770 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 [2021-11-23 13:39:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:33,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:42,969 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 [2021-11-23 13:39:42,970 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 [2021-11-23 13:39:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:43,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866821974] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:43,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:43,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 31] total 75 [2021-11-23 13:39:43,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458038789] [2021-11-23 13:39:43,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:43,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-23 13:39:43,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-23 13:39:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 13:39:43,840 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 75 states, 75 states have (on average 5.64) internal successors, (423), 75 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:45,075 INFO L93 Difference]: Finished difference Result 409 states and 412 transitions. [2021-11-23 13:39:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 13:39:45,076 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.64) internal successors, (423), 75 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-23 13:39:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:45,077 INFO L225 Difference]: With dead ends: 409 [2021-11-23 13:39:45,077 INFO L226 Difference]: Without dead ends: 239 [2021-11-23 13:39:45,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 401 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=332, Invalid=7678, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 13:39:45,078 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 65 mSDsluCounter, 3999 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 4100 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:45,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 4100 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1442 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2021-11-23 13:39:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-23 13:39:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2021-11-23 13:39:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.0258620689655173) internal successors, (238), 235 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2021-11-23 13:39:45,083 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 223 [2021-11-23 13:39:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:45,083 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2021-11-23 13:39:45,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.64) internal successors, (423), 75 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2021-11-23 13:39:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-23 13:39:45,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:45,085 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:45,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-23 13:39:45,291 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1479619150, now seen corresponding path program 22 times [2021-11-23 13:39:45,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:45,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043261091] [2021-11-23 13:39:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:45,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 190 proven. 782 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:45,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043261091] [2021-11-23 13:39:45,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043261091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:45,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188278411] [2021-11-23 13:39:45,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:39:45,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:45,883 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:45,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 13:39:46,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:39:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 13:39:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 231 proven. 741 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:47,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:48,231 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 [2021-11-23 13:39:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 231 proven. 741 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-23 13:39:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188278411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:48,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2021-11-23 13:39:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994289091] [2021-11-23 13:39:48,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 13:39:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 13:39:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 13:39:48,410 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand has 60 states, 59 states have (on average 6.508474576271187) internal successors, (384), 60 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:49,554 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-11-23 13:39:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 13:39:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 6.508474576271187) internal successors, (384), 60 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-11-23 13:39:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:49,556 INFO L225 Difference]: With dead ends: 258 [2021-11-23 13:39:49,556 INFO L226 Difference]: Without dead ends: 258 [2021-11-23 13:39:49,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 420 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1059, Invalid=4641, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 13:39:49,557 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1325 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:49,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 1837 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:39:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-23 13:39:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 247. [2021-11-23 13:39:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.02880658436214) internal successors, (250), 246 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 250 transitions. [2021-11-23 13:39:49,562 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 250 transitions. Word has length 227 [2021-11-23 13:39:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:49,562 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 250 transitions. [2021-11-23 13:39:49,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 6.508474576271187) internal successors, (384), 60 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:39:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 250 transitions. [2021-11-23 13:39:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-23 13:39:49,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:49,564 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:49,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:49,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-23 13:39:49,786 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:39:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1376446620, now seen corresponding path program 14 times [2021-11-23 13:39:49,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736332354] [2021-11-23 13:39:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:49,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 48 proven. 1167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:39:51,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736332354] [2021-11-23 13:39:51,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736332354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113495055] [2021-11-23 13:39:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:51,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:51,431 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:51,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 13:39:51,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:51,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-23 13:39:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:52,405 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 [2021-11-23 13:39:53,907 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-23 13:39:53,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-23 13:39:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 48 proven. 891 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:39:53,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 13:39:54,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-23 13:39:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 48 proven. 891 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:39:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113495055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:55,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:55,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 37, 37] total 99 [2021-11-23 13:39:55,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452491422] [2021-11-23 13:39:55,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 13:39:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 13:39:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=9343, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 13:39:55,921 INFO L87 Difference]: Start difference. First operand 247 states and 250 transitions. Second operand has 99 states, 99 states have (on average 4.646464646464646) internal successors, (460), 99 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:01,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:01,533 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2021-11-23 13:40:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 13:40:01,534 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.646464646464646) internal successors, (460), 99 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-11-23 13:40:01,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:01,535 INFO L225 Difference]: With dead ends: 381 [2021-11-23 13:40:01,535 INFO L226 Difference]: Without dead ends: 257 [2021-11-23 13:40:01,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 404 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4154 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1173, Invalid=18849, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 13:40:01,536 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 879 mSDsluCounter, 5635 mSDsCounter, 0 mSdLazyCounter, 7188 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 5743 SdHoareTripleChecker+Invalid, 7954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 7188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 648 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:01,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 5743 Invalid, 7954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 7188 Invalid, 0 Unknown, 648 Unchecked, 2.8s Time] [2021-11-23 13:40:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-23 13:40:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-11-23 13:40:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.0283400809716599) internal successors, (254), 250 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2021-11-23 13:40:01,541 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 228 [2021-11-23 13:40:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:01,541 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2021-11-23 13:40:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.646464646464646) internal successors, (460), 99 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2021-11-23 13:40:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-23 13:40:01,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:01,543 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:01,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:01,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 13:40:01,747 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -646093319, now seen corresponding path program 15 times [2021-11-23 13:40:01,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662630873] [2021-11-23 13:40:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:01,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 190 proven. 794 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:02,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662630873] [2021-11-23 13:40:02,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662630873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:02,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952345479] [2021-11-23 13:40:02,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:40:02,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:02,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:02,358 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:02,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 13:40:04,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 13:40:04,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 13:40:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:04,251 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:40:04,251 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 [2021-11-23 13:40:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 231 proven. 753 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:05,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 276 proven. 708 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:08,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952345479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:08,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:08,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2021-11-23 13:40:08,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308176165] [2021-11-23 13:40:08,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:08,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-23 13:40:08,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-23 13:40:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1045, Invalid=6265, Unknown=0, NotChecked=0, Total=7310 [2021-11-23 13:40:08,135 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 86 states, 85 states have (on average 6.541176470588235) internal successors, (556), 86 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:09,195 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-11-23 13:40:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 13:40:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 6.541176470588235) internal successors, (556), 86 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-23 13:40:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:09,196 INFO L225 Difference]: With dead ends: 260 [2021-11-23 13:40:09,196 INFO L226 Difference]: Without dead ends: 256 [2021-11-23 13:40:09,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1951, Invalid=8149, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 13:40:09,197 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 834 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:09,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1232 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:40:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-23 13:40:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 250. [2021-11-23 13:40:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 246 states have (on average 1.024390243902439) internal successors, (252), 249 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2021-11-23 13:40:09,203 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 232 [2021-11-23 13:40:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:09,203 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2021-11-23 13:40:09,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 6.541176470588235) internal successors, (556), 86 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2021-11-23 13:40:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 13:40:09,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:09,206 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:09,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:09,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 13:40:09,418 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2140051808, now seen corresponding path program 23 times [2021-11-23 13:40:09,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165475852] [2021-11-23 13:40:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:09,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:10,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165475852] [2021-11-23 13:40:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165475852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:10,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400787634] [2021-11-23 13:40:10,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:40:10,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:10,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:10,387 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:10,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 13:40:11,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 13:40:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:11,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 13:40:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:11,902 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 [2021-11-23 13:40:14,442 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 [2021-11-23 13:40:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:14,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:16,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:40:16,896 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 [2021-11-23 13:40:16,950 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 [2021-11-23 13:40:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-23 13:40:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400787634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:17,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:17,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 37, 37] total 84 [2021-11-23 13:40:17,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289095365] [2021-11-23 13:40:17,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:17,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 13:40:17,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 13:40:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6762, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 13:40:17,338 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:23,817 INFO L93 Difference]: Finished difference Result 715 states and 720 transitions. [2021-11-23 13:40:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 13:40:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2021-11-23 13:40:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:23,818 INFO L225 Difference]: With dead ends: 715 [2021-11-23 13:40:23,819 INFO L226 Difference]: Without dead ends: 264 [2021-11-23 13:40:23,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 430 SyntacticMatches, 17 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 14 DeprecatedPredicates, 4126 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=635, Invalid=20535, Unknown=0, NotChecked=0, Total=21170 [2021-11-23 13:40:23,820 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 161 mSDsluCounter, 6636 mSDsCounter, 0 mSdLazyCounter, 3905 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 6749 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2055 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:23,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 6749 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3905 Invalid, 0 Unknown, 2055 Unchecked, 1.5s Time] [2021-11-23 13:40:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-23 13:40:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2021-11-23 13:40:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 254 states have (on average 1.0236220472440944) internal successors, (260), 257 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2021-11-23 13:40:23,825 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 241 [2021-11-23 13:40:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2021-11-23 13:40:23,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 6.154761904761905) internal successors, (517), 84 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2021-11-23 13:40:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-23 13:40:23,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:23,827 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:23,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:24,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-23 13:40:24,039 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1742094374, now seen corresponding path program 24 times [2021-11-23 13:40:24,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:24,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439025364] [2021-11-23 13:40:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:24,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 231 proven. 913 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:24,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439025364] [2021-11-23 13:40:24,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439025364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655366179] [2021-11-23 13:40:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:40:24,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:24,753 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:24,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 13:40:31,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-23 13:40:31,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 13:40:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:32,021 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:40:32,022 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 [2021-11-23 13:40:32,030 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 [2021-11-23 13:40:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 13:40:33,586 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-23 13:40:33,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-23 13:40:35,365 INFO L354 Elim1Store]: treesize reduction 37, result has 27.5 percent of original size [2021-11-23 13:40:35,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 34 [2021-11-23 13:40:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 60 proven. 63 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2021-11-23 13:40:35,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:37,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-11-23 13:40:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2021-11-23 13:40:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655366179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:40,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:40,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9, 9] total 46 [2021-11-23 13:40:40,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150868138] [2021-11-23 13:40:40,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 13:40:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 13:40:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:40:40,072 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand has 47 states, 46 states have (on average 5.978260869565218) internal successors, (275), 47 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:42,072 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2021-11-23 13:40:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:40:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.978260869565218) internal successors, (275), 47 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-11-23 13:40:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:42,074 INFO L225 Difference]: With dead ends: 268 [2021-11-23 13:40:42,074 INFO L226 Difference]: Without dead ends: 268 [2021-11-23 13:40:42,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 494 SyntacticMatches, 28 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=777, Invalid=5543, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 13:40:42,074 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 527 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 2282 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:42,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 2282 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 556 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2021-11-23 13:40:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-23 13:40:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 257. [2021-11-23 13:40:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 256 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) [2021-11-23 13:40:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2021-11-23 13:40:42,079 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 249 [2021-11-23 13:40:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:42,080 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2021-11-23 13:40:42,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.978260869565218) internal successors, (275), 47 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2021-11-23 13:40:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 13:40:42,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:42,082 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:42,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:42,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:42,297 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1829649240, now seen corresponding path program 16 times [2021-11-23 13:40:42,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441601014] [2021-11-23 13:40:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 231 proven. 926 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:42,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441601014] [2021-11-23 13:40:42,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441601014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653468408] [2021-11-23 13:40:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:40:42,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:42,980 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:42,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 13:40:43,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:40:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 13:40:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:43,531 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:40:43,532 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 [2021-11-23 13:40:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 276 proven. 881 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:45,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 325 proven. 832 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:47,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653468408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:47,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2021-11-23 13:40:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415541363] [2021-11-23 13:40:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:47,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 13:40:47,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 13:40:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=7171, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 13:40:47,694 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 91 states, 90 states have (on average 6.588888888888889) internal successors, (593), 91 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:48,980 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2021-11-23 13:40:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:40:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 6.588888888888889) internal successors, (593), 91 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-23 13:40:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:48,981 INFO L225 Difference]: With dead ends: 278 [2021-11-23 13:40:48,981 INFO L226 Difference]: Without dead ends: 276 [2021-11-23 13:40:48,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 439 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1935, Invalid=9407, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 13:40:48,982 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 897 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:48,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 2330 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 13:40:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-23 13:40:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2021-11-23 13:40:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 266 states have (on average 1.0225563909774436) internal successors, (272), 268 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 272 transitions. [2021-11-23 13:40:48,987 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 272 transitions. Word has length 250 [2021-11-23 13:40:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:48,987 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 272 transitions. [2021-11-23 13:40:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 6.588888888888889) internal successors, (593), 91 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 272 transitions. [2021-11-23 13:40:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-23 13:40:48,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:48,989 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:49,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:49,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-23 13:40:49,189 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1829640189, now seen corresponding path program 1 times [2021-11-23 13:40:49,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:49,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427869150] [2021-11-23 13:40:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:49,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 231 proven. 913 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:49,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:49,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427869150] [2021-11-23 13:40:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427869150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052860259] [2021-11-23 13:40:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:49,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:49,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:49,848 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:49,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 13:40:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:40:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1322 trivial. 0 not checked. [2021-11-23 13:40:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1322 trivial. 0 not checked. [2021-11-23 13:40:50,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052860259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:50,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:50,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 37 [2021-11-23 13:40:50,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701235957] [2021-11-23 13:40:50,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:50,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:40:50,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:50,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:40:50,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:40:50,856 INFO L87 Difference]: Start difference. First operand 269 states and 272 transitions. Second operand has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:54,307 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2021-11-23 13:40:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-23 13:40:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2021-11-23 13:40:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:54,309 INFO L225 Difference]: With dead ends: 267 [2021-11-23 13:40:54,309 INFO L226 Difference]: Without dead ends: 267 [2021-11-23 13:40:54,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 493 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2160, Invalid=11180, Unknown=0, NotChecked=0, Total=13340 [2021-11-23 13:40:54,311 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 806 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 2960 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1001 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2960 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 13:40:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-23 13:40:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2021-11-23 13:40:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2021-11-23 13:40:54,317 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 250 [2021-11-23 13:40:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:54,318 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2021-11-23 13:40:54,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:40:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2021-11-23 13:40:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-23 13:40:54,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:54,329 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:54,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:54,530 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:40:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1397644643, now seen corresponding path program 17 times [2021-11-23 13:40:54,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114858498] [2021-11-23 13:40:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:54,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 833 proven. 458 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:55,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114858498] [2021-11-23 13:40:55,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114858498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:55,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008141306] [2021-11-23 13:40:55,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:40:55,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:55,188 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:55,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 13:40:56,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-23 13:40:56,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 13:40:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:56,325 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:40:56,325 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 [2021-11-23 13:40:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:40:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 966 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:58,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 966 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-23 13:40:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008141306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:59,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:59,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 79 [2021-11-23 13:40:59,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232509610] [2021-11-23 13:40:59,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:59,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 13:40:59,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:59,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 13:40:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=5025, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 13:40:59,631 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand has 79 states, 79 states have (on average 6.2405063291139244) internal successors, (493), 79 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:00,379 INFO L93 Difference]: Finished difference Result 469 states and 472 transitions. [2021-11-23 13:41:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 13:41:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 6.2405063291139244) internal successors, (493), 79 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2021-11-23 13:41:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:00,381 INFO L225 Difference]: With dead ends: 469 [2021-11-23 13:41:00,381 INFO L226 Difference]: Without dead ends: 268 [2021-11-23 13:41:00,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 473 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1836, Invalid=7094, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 13:41:00,382 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 251 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:00,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 911 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:41:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-23 13:41:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 265. [2021-11-23 13:41:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0113636363636365) internal successors, (267), 264 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2021-11-23 13:41:00,387 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 260 [2021-11-23 13:41:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:00,387 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2021-11-23 13:41:00,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 6.2405063291139244) internal successors, (493), 79 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2021-11-23 13:41:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-23 13:41:00,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:00,389 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:00,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:00,595 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:41:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1926244550, now seen corresponding path program 18 times [2021-11-23 13:41:00,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:00,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524510486] [2021-11-23 13:41:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:00,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 56 proven. 1613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:41:02,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:02,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524510486] [2021-11-23 13:41:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524510486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:02,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611924783] [2021-11-23 13:41:02,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:41:02,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:02,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:02,545 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:02,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 13:41:12,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-23 13:41:12,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-23 13:41:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:12,164 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:41:12,165 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 [2021-11-23 13:41:13,571 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 [2021-11-23 13:41:16,531 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-23 13:41:16,531 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 39 treesize of output 21 [2021-11-23 13:41:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 940 proven. 351 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-23 13:41:16,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:23,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:41:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 109 [2021-11-23 13:41:23,233 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 [2021-11-23 13:41:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 780 proven. 511 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-23 13:41:26,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611924783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:26,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:26,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 39, 39] total 129 [2021-11-23 13:41:26,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264484514] [2021-11-23 13:41:26,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:26,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-23 13:41:26,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-23 13:41:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=15407, Unknown=0, NotChecked=0, Total=16512 [2021-11-23 13:41:26,495 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 129 states, 129 states have (on average 5.24031007751938) internal successors, (676), 129 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:59,403 INFO L93 Difference]: Finished difference Result 418 states and 420 transitions. [2021-11-23 13:41:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-23 13:41:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 5.24031007751938) internal successors, (676), 129 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-23 13:41:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:59,404 INFO L225 Difference]: With dead ends: 418 [2021-11-23 13:41:59,404 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 13:41:59,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24127 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=5415, Invalid=74386, Unknown=5, NotChecked=0, Total=79806 [2021-11-23 13:41:59,407 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 581 mSDsluCounter, 4120 mSDsCounter, 0 mSdLazyCounter, 4462 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 4197 SdHoareTripleChecker+Invalid, 5029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:59,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 4197 Invalid, 5029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4462 Invalid, 0 Unknown, 421 Unchecked, 1.9s Time] [2021-11-23 13:41:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 13:41:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 13:41:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 13:41:59,409 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 264 [2021-11-23 13:41:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:59,409 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 13:41:59,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 5.24031007751938) internal successors, (676), 129 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:41:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 13:41:59,410 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 13:41:59,413 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-11-23 13:41:59,413 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-11-23 13:41:59,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-11-23 13:41:59,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-11-23 13:41:59,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-11-23 13:41:59,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-11-23 13:41:59,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-11-23 13:41:59,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-11-23 13:41:59,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-11-23 13:41:59,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-11-23 13:41:59,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-11-23 13:41:59,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-11-23 13:41:59,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-11-23 13:41:59,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-11-23 13:41:59,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-11-23 13:41:59,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-11-23 13:41:59,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-11-23 13:41:59,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-11-23 13:41:59,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-11-23 13:41:59,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-23 13:41:59,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-23 13:41:59,630 INFO L732 BasicCegarLoop]: Path program histogram: [24, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:59,632 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:41:59,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:41:59 BoogieIcfgContainer [2021-11-23 13:41:59,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:41:59,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:41:59,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:41:59,636 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:41:59,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:36:25" (3/4) ... [2021-11-23 13:41:59,640 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 13:41:59,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-23 13:41:59,667 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 13:41:59,668 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 13:41:59,668 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 13:41:59,714 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:41:59,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:41:59,715 INFO L158 Benchmark]: Toolchain (without parser) took 335209.09ms. Allocated memory was 132.1MB in the beginning and 308.3MB in the end (delta: 176.2MB). Free memory was 101.6MB in the beginning and 184.0MB in the end (delta: -82.4MB). Peak memory consumption was 94.3MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,715 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 132.1MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:41:59,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 659.04ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 98.1MB in the end (delta: 3.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,716 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.91ms. Allocated memory is still 132.1MB. Free memory was 98.1MB in the beginning and 96.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,716 INFO L158 Benchmark]: Boogie Preprocessor took 44.75ms. Allocated memory is still 132.1MB. Free memory was 96.0MB in the beginning and 94.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,716 INFO L158 Benchmark]: RCFGBuilder took 611.00ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 80.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,717 INFO L158 Benchmark]: TraceAbstraction took 333726.31ms. Allocated memory was 132.1MB in the beginning and 308.3MB in the end (delta: 176.2MB). Free memory was 80.5MB in the beginning and 188.5MB in the end (delta: -108.0MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,717 INFO L158 Benchmark]: Witness Printer took 79.15ms. Allocated memory is still 308.3MB. Free memory was 188.5MB in the beginning and 184.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 13:41:59,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 132.1MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 659.04ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 98.1MB in the end (delta: 3.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.91ms. Allocated memory is still 132.1MB. Free memory was 98.1MB in the beginning and 96.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.75ms. Allocated memory is still 132.1MB. Free memory was 96.0MB in the beginning and 94.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 611.00ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 80.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 333726.31ms. Allocated memory was 132.1MB in the beginning and 308.3MB in the end (delta: 176.2MB). Free memory was 80.5MB in the beginning and 188.5MB in the end (delta: -108.0MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. * Witness Printer took 79.15ms. Allocated memory is still 308.3MB. Free memory was 188.5MB in the beginning and 184.0MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 57 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 333.6s, OverallIterations: 65, TraceHistogramMax: 15, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.1s, AutomataDifference: 109.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28102 SdHoareTripleChecker+Valid, 26.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28102 mSDsluCounter, 76053 SdHoareTripleChecker+Invalid, 22.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 10145 IncrementalHoareTripleChecker+Unchecked, 72093 mSDsCounter, 3056 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 62128 IncrementalHoareTripleChecker+Invalid, 75329 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3056 mSolverCounterUnsat, 3960 mSDtfsCounter, 62128 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15513 GetRequests, 11888 SyntacticMatches, 173 SemanticMatches, 3452 ConstructedPredicates, 1 IntricatePredicates, 74 DeprecatedPredicates, 86232 ImplicationChecksByTransitivity, 175.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=269occurred in iteration=62, InterpolantAutomatonStates: 1899, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 65 MinimizatonAttempts, 669 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 34.5s SatisfiabilityAnalysisTime, 176.0s InterpolantComputationTime, 13562 NumberOfCodeBlocks, 13562 NumberOfCodeBlocksAsserted, 302 NumberOfCheckSat, 20038 ConstructedInterpolants, 2139 QuantifiedInterpolants, 228417 SizeOfPredicates, 663 NumberOfNonLiveVariables, 23770 ConjunctsInSsa, 2382 ConjunctsInUnsatCore, 157 InterpolantComputations, 19 PerfectInterpolantSequences, 33430/81249 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 13:41:59,929 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-23 13:41:59,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b40dc01-7ab0-48a2-b20c-a4cbe40e3051/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE